diff --git a/.flake8 b/.flake8
index 80d5c3e71..ce4ecbfbe 100644
--- a/.flake8
+++ b/.flake8
@@ -9,7 +9,7 @@
 #     what you do. We choose to break before operators.
 ignore = E721,W503
 
-exclude = jsparagus_build_venv,rust/target,jsparagus/parse_pgen_generated.py,js_parser/parser_tables.py
+exclude = jsparagus_build_venv,crates/target,jsparagus/parse_pgen_generated.py,js_parser/parser_tables.py
 
 # todo: get this down to 99
 max_line_length=109
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 000000000..ced0b5d1d
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,456 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "arrayref"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
+
+[[package]]
+name = "arrayvec"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cff77d8686867eceff3105329d4698d96c2391c176d5d03adc90c7389162b5b8"
+
+[[package]]
+name = "autocfg"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
+
+[[package]]
+name = "base64"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b41b7ea54a0c9d92199de89e20e58d49f02f8e699814ef3fdf266f6f748d15c7"
+
+[[package]]
+name = "bitflags"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+
+[[package]]
+name = "blake2b_simd"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8fb2d74254a3a0b5cac33ac9f8ed0e44aa50378d9dbb2e5d83bd21ed1dc2c8a"
+dependencies = [
+ "arrayref",
+ "arrayvec",
+ "constant_time_eq",
+]
+
+[[package]]
+name = "bumpalo"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad807f2fc2bf185eeb98ff3a901bd46dc5ad58163d0fa4577ba0d25674d71708"
+
+[[package]]
+name = "byteorder"
+version = "1.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
+
+[[package]]
+name = "cc"
+version = "1.0.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+
+[[package]]
+name = "constant_time_eq"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce446db02cdc3165b94ae73111e570793400d0794e46125cc4056c81cbb039f4"
+dependencies = [
+ "autocfg",
+ "cfg-if",
+ "lazy_static",
+]
+
+[[package]]
+name = "dirs"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13aea89a5c93364a98e9b37b2fa237effbb694d5cfe01c5b70941f7eb087d5e3"
+dependencies = [
+ "cfg-if",
+ "dirs-sys",
+]
+
+[[package]]
+name = "dirs-sys"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "afa0b23de8fd801745c471deffa6e12d248f962c9fd4b4c33787b055599bde7b"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_users",
+ "winapi",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.1.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "itoa"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8b7a7c0c47db5545ed3fef7468ee7bb5b74691498139e4b3f6a20685dc6dd8e"
+
+[[package]]
+name = "jsparagus"
+version = "0.1.0"
+dependencies = [
+ "jsparagus-ast",
+ "jsparagus-driver",
+ "jsparagus-emitter",
+ "jsparagus-generated-parser",
+ "jsparagus-interpreter",
+ "jsparagus-parser",
+]
+
+[[package]]
+name = "jsparagus-ast"
+version = "0.1.0"
+dependencies = [
+ "bumpalo",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "jsparagus-driver"
+version = "0.1.0"
+dependencies = [
+ "bumpalo",
+ "jsparagus-ast",
+ "jsparagus-emitter",
+ "jsparagus-interpreter",
+ "jsparagus-parser",
+ "rustyline",
+ "rustyline-derive",
+]
+
+[[package]]
+name = "jsparagus-emitter"
+version = "0.1.0"
+dependencies = [
+ "bumpalo",
+ "byteorder",
+ "jsparagus-ast",
+ "jsparagus-parser",
+]
+
+[[package]]
+name = "jsparagus-generated-parser"
+version = "0.1.0"
+dependencies = [
+ "bumpalo",
+ "jsparagus-ast",
+]
+
+[[package]]
+name = "jsparagus-interpreter"
+version = "0.1.0"
+dependencies = [
+ "bumpalo",
+ "jsparagus-ast",
+ "jsparagus-emitter",
+ "jsparagus-parser",
+]
+
+[[package]]
+name = "jsparagus-parser"
+version = "0.1.0"
+dependencies = [
+ "bumpalo",
+ "jsparagus-ast",
+ "jsparagus-generated-parser",
+ "unic-ucd-ident",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "libc"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb147597cdf94ed43ab7a9038716637d2d1bf2bc571da995d0028dec06bd3018"
+
+[[package]]
+name = "log"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "memchr"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53445de381a1f436797497c61d851644d0e8e88e6140f22872ad33a704933978"
+
+[[package]]
+name = "nix"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c722bee1037d430d0f8e687bbdbf222f27cc6e4e68d5caf630857bb2b6dbdce"
+dependencies = [
+ "bitflags",
+ "cc",
+ "cfg-if",
+ "libc",
+ "void",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.56"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
+
+[[package]]
+name = "redox_users"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09b23093265f8d200fa7b4c2c76297f47e681c655f6f1285a8780d6a022f7431"
+dependencies = [
+ "getrandom",
+ "redox_syscall",
+ "rust-argon2",
+]
+
+[[package]]
+name = "rust-argon2"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bc8af4bda8e1ff4932523b94d3dd20ee30a87232323eda55903ffd71d2fb017"
+dependencies = [
+ "base64",
+ "blake2b_simd",
+ "constant_time_eq",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "rustyline"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de64be8eecbe428b6924f1d8430369a01719fbb182c26fa431ddbb0a95f5315d"
+dependencies = [
+ "cfg-if",
+ "dirs",
+ "libc",
+ "log",
+ "memchr",
+ "nix",
+ "unicode-segmentation",
+ "unicode-width",
+ "utf8parse",
+ "winapi",
+]
+
+[[package]]
+name = "rustyline-derive"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69377056936308234fbb8f8789cada21b40b7796808a62783cdbe5c1315a0212"
+dependencies = [
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "ryu"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa8506c1de11c9c4e4c38863ccbe02a305c8188e85a05a784c9e11e1c3910c8"
+
+[[package]]
+name = "serde"
+version = "1.0.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "414115f25f818d7dfccec8ee535d76949ae78584fc4f79a6f45a904bf8ab4449"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "128f9e303a5a29922045a830221b8f78ec74a5f544944f3d5984f8ec3895ef64"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9371ade75d4c2d6cb154141b9752cf3781ec9c05e0e5cf35060e1e70ee7b9c25"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "unic-char-property"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8c57a407d9b6fa02b4795eb81c5b6652060a15a7903ea981f3d723e6c0be221"
+dependencies = [
+ "unic-char-range",
+]
+
+[[package]]
+name = "unic-char-range"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0398022d5f700414f6b899e10b8348231abf9173fa93144cbc1a43b9793c1fbc"
+
+[[package]]
+name = "unic-common"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80d7ff825a6a654ee85a63e80f92f054f904f21e7d12da4e22f9834a4aaa35bc"
+
+[[package]]
+name = "unic-ucd-ident"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e230a37c0381caa9219d67cf063aa3a375ffed5bf541a452db16e744bdab6987"
+dependencies = [
+ "unic-char-property",
+ "unic-char-range",
+ "unic-ucd-version",
+]
+
+[[package]]
+name = "unic-ucd-version"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96bd2f2237fe450fcd0a1d2f5f4e91711124f7857ba2e964247776ebeeb7b0c4"
+dependencies = [
+ "unic-common",
+]
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+
+[[package]]
+name = "utf8parse"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8772a4ccbb4e89959023bc5b7cb8623a795caa7092d99f3aa9501b9484d4557d"
+
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+
+[[package]]
+name = "wasi"
+version = "0.9.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
+
+[[package]]
+name = "winapi"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 000000000..66221e190
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = "jsparagus"
+authors = ["The jsparagus Project Developers"]
+version = "0.1.0"
+description = "A JavaScript parser"
+license = "MIT/Apache-2.0"
+repository = "https://github.com/mozilla-spidermonkey/jsparagus"
+publish = false
+edition = "2018"
+
+[workspace]
+
+[lib]
+
+[dependencies]
+jsparagus-ast = { path = "crates/ast" }
+jsparagus-driver = { path = "crates/driver", optional = true }
+jsparagus-emitter = { path = "crates/emitter" }
+jsparagus-generated-parser = { path = "crates/generated_parser" }
+jsparagus-parser = { path = "crates/parser" }
+jsparagus-interpreter = { path = "crates/interpreter", optional = true  }
+
+[features]
+default = []
+full = ["jsparagus-driver", "jsparagus-interpreter"]
+
+[profile.release]
+debug = true  # enable debug symbols in release builds
diff --git a/Makefile b/Makefile
index a1d95e5b4..da9caeee3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,12 @@
 PY_OUT = js_parser/parser_tables.py
-HANDLER_FILE = rust/generated_parser/src/ast_builder.rs
+HANDLER_FILE = crates/generated_parser/src/ast_builder.rs
 HANDLER_INFO_OUT = jsparagus/emit/collect_handler_info/info.json
-RS_TABLES_OUT = rust/generated_parser/src/parser_tables_generated.rs
-RS_AST_OUT = rust/ast/src/types_generated.rs \
-	rust/ast/src/type_id_generated.rs \
-	rust/ast/src/visit_generated.rs \
-	rust/ast/src/source_location_accessor_generated.rs \
-	rust/generated_parser/src/stack_value_generated.rs
+RS_TABLES_OUT = crates/generated_parser/src/parser_tables_generated.rs
+RS_AST_OUT = crates/ast/src/types_generated.rs \
+	crates/ast/src/type_id_generated.rs \
+	crates/ast/src/visit_generated.rs \
+	crates/ast/src/source_location_accessor_generated.rs \
+	crates/generated_parser/src/stack_value_generated.rs
 
 JSPARAGUS_DIR := $(dir $(firstword $(MAKEFILE_LIST)))
 VENV_BIN_DIR := $(JSPARAGUS_DIR)jsparagus_build_venv/bin
@@ -52,8 +52,8 @@ $(PY_OUT): $(EMIT_FILES) $(DUMP_FILE)
 $(HANDLER_INFO_OUT): jsparagus/emit/collect_handler_info/src/main.rs $(HANDLER_FILE)
 	(cd jsparagus/emit/collect_handler_info/; cargo run --bin collect_handler_info ../../../$(HANDLER_FILE) $(subst jsparagus/emit/collect_handler_info/,,$(HANDLER_INFO_OUT)))
 
-$(RS_AST_OUT): rust/ast/ast.json rust/ast/generate_ast.py
-	(cd rust/ast && $(abspath $(PYTHON)) generate_ast.py)
+$(RS_AST_OUT): crates/ast/ast.json crates/ast/generate_ast.py
+	(cd crates/ast && $(abspath $(PYTHON)) generate_ast.py)
 
 $(RS_TABLES_OUT): $(EMIT_FILES) $(DUMP_FILE) $(HANDLER_INFO_OUT)
 	$(PYTHON) -m js_parser.generate_js_parser_tables --progress -o $@ $(DUMP_FILE) $(HANDLER_INFO_OUT)
@@ -64,11 +64,11 @@ $(STANDARD_ES_GRAMMAR_OUT): $(ECMA262_SPEC_HTML)
 	$(PYTHON) -m js_parser.extract_es_grammar $(ECMA262_SPEC_HTML) > $@ || rm $@
 
 rust: $(RS_AST_OUT) $(RS_TABLES_OUT)
-	cd rust && cargo build
+	cargo build
 
 check: all
 	./test.sh
-	cd rust && cargo fmt && cargo test
+	cargo fmt && cargo test
 
 jsdemo: $(PY_OUT)
 	$(PYTHON) -m js_parser.try_it
diff --git a/README.md b/README.md
index 2d6464ed7..d340da07f 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ When it's done, you can:
 
 *   Run `make check` to make sure things are working.
 
-*   `cd rust && cargo run` to test the JS parser and bytecode emitter.
+*   `cd crates/driver && cargo run` to test the JS parser and bytecode emitter.
 
 
 ## Limitations
diff --git a/rust/ast/Cargo.toml b/crates/ast/Cargo.toml
similarity index 100%
rename from rust/ast/Cargo.toml
rename to crates/ast/Cargo.toml
diff --git a/rust/ast/ast.json b/crates/ast/ast.json
similarity index 100%
rename from rust/ast/ast.json
rename to crates/ast/ast.json
diff --git a/rust/ast/generate_ast.py b/crates/ast/generate_ast.py
similarity index 99%
rename from rust/ast/generate_ast.py
rename to crates/ast/generate_ast.py
index 7a90b78e7..1eb861c5a 100755
--- a/rust/ast/generate_ast.py
+++ b/crates/ast/generate_ast.py
@@ -177,7 +177,7 @@ def stack_value(ast):
     with open("../generated_parser/src/stack_value_generated.rs", "w+") as f:
         def write(*args):
             write_impl(f, *args)
-        write(0, "// WARNING: This file is auto-generated by rust/ast/generate_ast.py.")
+        write(0, "// WARNING: This file is auto-generated by crates/ast/generate_ast.py.")
         write(0, "")
         write(0, "use crate::token::Token;")
         write(0, "use ast::arena;")
@@ -245,7 +245,7 @@ def loc_trait(ast):
     with open("src/source_location_accessor_generated.rs", "w+") as f:
         def write(*args):
             write_impl(f, *args)
-        write(0, "// WARNING: This file is auto-generated by rust/ast/generate_ast.py.")
+        write(0, "// WARNING: This file is auto-generated by crates/ast/generate_ast.py.")
         write(0, "")
         write(0, "use crate::SourceLocation;")
         write(0, "use crate::arena;")
diff --git a/rust/ast/src/arena.rs b/crates/ast/src/arena.rs
similarity index 100%
rename from rust/ast/src/arena.rs
rename to crates/ast/src/arena.rs
diff --git a/rust/ast/src/associated_data.rs b/crates/ast/src/associated_data.rs
similarity index 100%
rename from rust/ast/src/associated_data.rs
rename to crates/ast/src/associated_data.rs
diff --git a/rust/ast/src/json.rs b/crates/ast/src/json.rs
similarity index 100%
rename from rust/ast/src/json.rs
rename to crates/ast/src/json.rs
diff --git a/rust/ast/src/lib.rs b/crates/ast/src/lib.rs
similarity index 100%
rename from rust/ast/src/lib.rs
rename to crates/ast/src/lib.rs
diff --git a/rust/ast/src/source_location.rs b/crates/ast/src/source_location.rs
similarity index 100%
rename from rust/ast/src/source_location.rs
rename to crates/ast/src/source_location.rs
diff --git a/rust/driver/Cargo.toml b/crates/driver/Cargo.toml
similarity index 100%
rename from rust/driver/Cargo.toml
rename to crates/driver/Cargo.toml
diff --git a/rust/driver/src/demo.rs b/crates/driver/src/demo.rs
similarity index 100%
rename from rust/driver/src/demo.rs
rename to crates/driver/src/demo.rs
diff --git a/rust/driver/src/main.rs b/crates/driver/src/main.rs
similarity index 100%
rename from rust/driver/src/main.rs
rename to crates/driver/src/main.rs
diff --git a/rust/emitter/Cargo.toml b/crates/emitter/Cargo.toml
similarity index 100%
rename from rust/emitter/Cargo.toml
rename to crates/emitter/Cargo.toml
diff --git a/rust/emitter/scripts/show_opcodes.py b/crates/emitter/scripts/show_opcodes.py
similarity index 100%
rename from rust/emitter/scripts/show_opcodes.py
rename to crates/emitter/scripts/show_opcodes.py
diff --git a/rust/emitter/src/ast_emitter.rs b/crates/emitter/src/ast_emitter.rs
similarity index 100%
rename from rust/emitter/src/ast_emitter.rs
rename to crates/emitter/src/ast_emitter.rs
diff --git a/rust/emitter/src/dis.rs b/crates/emitter/src/dis.rs
similarity index 100%
rename from rust/emitter/src/dis.rs
rename to crates/emitter/src/dis.rs
diff --git a/rust/emitter/src/emitter.rs b/crates/emitter/src/emitter.rs
similarity index 100%
rename from rust/emitter/src/emitter.rs
rename to crates/emitter/src/emitter.rs
diff --git a/rust/emitter/src/lib.rs b/crates/emitter/src/lib.rs
similarity index 100%
rename from rust/emitter/src/lib.rs
rename to crates/emitter/src/lib.rs
diff --git a/rust/emitter/src/lower/mod.rs b/crates/emitter/src/lower/mod.rs
similarity index 100%
rename from rust/emitter/src/lower/mod.rs
rename to crates/emitter/src/lower/mod.rs
diff --git a/rust/emitter/src/lower/scope.rs b/crates/emitter/src/lower/scope.rs
similarity index 100%
rename from rust/emitter/src/lower/scope.rs
rename to crates/emitter/src/lower/scope.rs
diff --git a/rust/emitter/src/opcode.rs b/crates/emitter/src/opcode.rs
similarity index 100%
rename from rust/emitter/src/opcode.rs
rename to crates/emitter/src/opcode.rs
diff --git a/rust/generated_parser/Cargo.toml b/crates/generated_parser/Cargo.toml
similarity index 100%
rename from rust/generated_parser/Cargo.toml
rename to crates/generated_parser/Cargo.toml
diff --git a/rust/generated_parser/src/ast_builder.rs b/crates/generated_parser/src/ast_builder.rs
similarity index 100%
rename from rust/generated_parser/src/ast_builder.rs
rename to crates/generated_parser/src/ast_builder.rs
diff --git a/rust/generated_parser/src/declaration_kind.rs b/crates/generated_parser/src/declaration_kind.rs
similarity index 100%
rename from rust/generated_parser/src/declaration_kind.rs
rename to crates/generated_parser/src/declaration_kind.rs
diff --git a/rust/generated_parser/src/early_errors.rs b/crates/generated_parser/src/early_errors.rs
similarity index 100%
rename from rust/generated_parser/src/early_errors.rs
rename to crates/generated_parser/src/early_errors.rs
diff --git a/rust/generated_parser/src/error.rs b/crates/generated_parser/src/error.rs
similarity index 100%
rename from rust/generated_parser/src/error.rs
rename to crates/generated_parser/src/error.rs
diff --git a/rust/generated_parser/src/lib.rs b/crates/generated_parser/src/lib.rs
similarity index 100%
rename from rust/generated_parser/src/lib.rs
rename to crates/generated_parser/src/lib.rs
diff --git a/rust/generated_parser/src/token.rs b/crates/generated_parser/src/token.rs
similarity index 100%
rename from rust/generated_parser/src/token.rs
rename to crates/generated_parser/src/token.rs
diff --git a/rust/interpreter/Cargo.toml b/crates/interpreter/Cargo.toml
similarity index 100%
rename from rust/interpreter/Cargo.toml
rename to crates/interpreter/Cargo.toml
diff --git a/rust/interpreter/src/evaluate.rs b/crates/interpreter/src/evaluate.rs
similarity index 100%
rename from rust/interpreter/src/evaluate.rs
rename to crates/interpreter/src/evaluate.rs
diff --git a/rust/interpreter/src/globals.rs b/crates/interpreter/src/globals.rs
similarity index 100%
rename from rust/interpreter/src/globals.rs
rename to crates/interpreter/src/globals.rs
diff --git a/rust/interpreter/src/lib.rs b/crates/interpreter/src/lib.rs
similarity index 100%
rename from rust/interpreter/src/lib.rs
rename to crates/interpreter/src/lib.rs
diff --git a/rust/interpreter/src/object.rs b/crates/interpreter/src/object.rs
similarity index 100%
rename from rust/interpreter/src/object.rs
rename to crates/interpreter/src/object.rs
diff --git a/rust/interpreter/src/tests.rs b/crates/interpreter/src/tests.rs
similarity index 100%
rename from rust/interpreter/src/tests.rs
rename to crates/interpreter/src/tests.rs
diff --git a/rust/interpreter/src/value.rs b/crates/interpreter/src/value.rs
similarity index 100%
rename from rust/interpreter/src/value.rs
rename to crates/interpreter/src/value.rs
diff --git a/rust/parser/Cargo.toml b/crates/parser/Cargo.toml
similarity index 100%
rename from rust/parser/Cargo.toml
rename to crates/parser/Cargo.toml
diff --git a/rust/parser/src/lexer.rs b/crates/parser/src/lexer.rs
similarity index 100%
rename from rust/parser/src/lexer.rs
rename to crates/parser/src/lexer.rs
diff --git a/rust/parser/src/lib.rs b/crates/parser/src/lib.rs
similarity index 100%
rename from rust/parser/src/lib.rs
rename to crates/parser/src/lib.rs
diff --git a/rust/parser/src/parser.rs b/crates/parser/src/parser.rs
similarity index 100%
rename from rust/parser/src/parser.rs
rename to crates/parser/src/parser.rs
diff --git a/rust/parser/src/simulator.rs b/crates/parser/src/simulator.rs
similarity index 100%
rename from rust/parser/src/simulator.rs
rename to crates/parser/src/simulator.rs
diff --git a/rust/parser/src/tests.rs b/crates/parser/src/tests.rs
similarity index 100%
rename from rust/parser/src/tests.rs
rename to crates/parser/src/tests.rs
diff --git a/js_parser/README.md b/js_parser/README.md
index e0899b37f..3696b8c4c 100644
--- a/js_parser/README.md
+++ b/js_parser/README.md
@@ -33,7 +33,7 @@ laptop.  jsparagus is slow.
 Once you're done, to see your parser run, try this:
 
 ```console
-$ cd rust
+$ cd crates/driver
 $ cargo run --release
 ```
 
diff --git a/jsparagus/README.md b/jsparagus/README.md
index bf3f8813d..24bb5632c 100644
--- a/jsparagus/README.md
+++ b/jsparagus/README.md
@@ -4,7 +4,7 @@ This directory contains an LALR parser generator called "jsparagus",
 written in Python.
 
 This is used to build parts of the jsparagus JS parser in
-[rust/generated_parser](https://github.com/mozilla-spidermonkey/jsparagus/blob/master/rust/generated_parser/).
+[crates/generated_parser](https://github.com/mozilla-spidermonkey/jsparagus/blob/master/crates/generated_parser/).
 
 jsparagus generates parsers only; it's "bring your own lexer".
 
@@ -58,7 +58,7 @@ Parser generators are complicated. Here's how this works.
     [runtime.py](https://github.com/jorendorff/jsparagus/blob/master/jsparagus/runtime.py).
     
     For Rust, it's in
-    [rust/parser/src/parser.rs](https://github.com/jorendorff/jsparagus/blob/master/rust/parser/src/parser.rs).
+    [crates/parser/src/parser.rs](https://github.com/jorendorff/jsparagus/blob/master/crates/parser/src/parser.rs).
     Because this code is currently tightly coupled to the JS lexer,
     jsparagus is not a fully general Rust parser generator yet.
     The Python code is more flexible.
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
deleted file mode 100644
index 93b3d9404..000000000
--- a/rust/Cargo.lock
+++ /dev/null
@@ -1,446 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "arrayref"
-version = "0.3.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "arrayvec"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "autocfg"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "base64"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "bitflags"
-version = "1.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "blake2b_simd"
-version = "0.5.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "arrayref 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "constant_time_eq 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bumpalo"
-version = "2.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "byteorder"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "cc"
-version = "1.0.50"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "cfg-if"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "constant_time_eq"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "dirs"
-version = "2.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "dirs-sys 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "dirs-sys"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_users 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "getrandom"
-version = "0.1.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "itoa"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "jsparagus-ast"
-version = "0.1.0"
-dependencies = [
- "bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "jsparagus-driver"
-version = "0.1.0"
-dependencies = [
- "bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsparagus-ast 0.1.0",
- "jsparagus-emitter 0.1.0",
- "jsparagus-interpreter 0.1.0",
- "jsparagus-parser 0.1.0",
- "rustyline 6.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustyline-derive 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "jsparagus-emitter"
-version = "0.1.0"
-dependencies = [
- "bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsparagus-ast 0.1.0",
- "jsparagus-parser 0.1.0",
-]
-
-[[package]]
-name = "jsparagus-generated-parser"
-version = "0.1.0"
-dependencies = [
- "bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsparagus-ast 0.1.0",
-]
-
-[[package]]
-name = "jsparagus-interpreter"
-version = "0.1.0"
-dependencies = [
- "bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsparagus-ast 0.1.0",
- "jsparagus-emitter 0.1.0",
- "jsparagus-parser 0.1.0",
-]
-
-[[package]]
-name = "jsparagus-parser"
-version = "0.1.0"
-dependencies = [
- "bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsparagus-ast 0.1.0",
- "jsparagus-generated-parser 0.1.0",
- "unic-ucd-ident 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "lazy_static"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "libc"
-version = "0.2.66"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "log"
-version = "0.4.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "memchr"
-version = "2.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "nix"
-version = "0.14.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "proc-macro2"
-version = "1.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "quote"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "redox_syscall"
-version = "0.1.56"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "redox_users"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
- "rust-argon2 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "rust-argon2"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "blake2b_simd 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "constant_time_eq 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "rustyline"
-version = "6.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "dirs 2.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "utf8parse 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "rustyline-derive"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "ryu"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "serde"
-version = "1.0.101"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "serde_derive"
-version = "1.0.101"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "serde_json"
-version = "1.0.40"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "syn"
-version = "1.0.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "unic-char-property"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unic-char-range 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "unic-char-range"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "unic-common"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "unic-ucd-ident"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unic-char-property 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unic-char-range 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unic-ucd-version 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "unic-ucd-version"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unic-common 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "unicode-segmentation"
-version = "1.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "unicode-width"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "unicode-xid"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "utf8parse"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "void"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "wasi"
-version = "0.9.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "winapi"
-version = "0.3.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum arrayref 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
-"checksum arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cff77d8686867eceff3105329d4698d96c2391c176d5d03adc90c7389162b5b8"
-"checksum autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
-"checksum base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b41b7ea54a0c9d92199de89e20e58d49f02f8e699814ef3fdf266f6f748d15c7"
-"checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
-"checksum blake2b_simd 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)" = "d8fb2d74254a3a0b5cac33ac9f8ed0e44aa50378d9dbb2e5d83bd21ed1dc2c8a"
-"checksum bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ad807f2fc2bf185eeb98ff3a901bd46dc5ad58163d0fa4577ba0d25674d71708"
-"checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
-"checksum cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)" = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
-"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-"checksum constant_time_eq 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
-"checksum crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ce446db02cdc3165b94ae73111e570793400d0794e46125cc4056c81cbb039f4"
-"checksum dirs 2.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "13aea89a5c93364a98e9b37b2fa237effbb694d5cfe01c5b70941f7eb087d5e3"
-"checksum dirs-sys 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "afa0b23de8fd801745c471deffa6e12d248f962c9fd4b4c33787b055599bde7b"
-"checksum getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
-"checksum itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "501266b7edd0174f8530248f87f99c88fbe60ca4ef3dd486835b8d8d53136f7f"
-"checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-"checksum libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)" = "d515b1f41455adea1313a4a2ac8a8a477634fbae63cc6100e3aebb207ce61558"
-"checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
-"checksum memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3197e20c7edb283f87c071ddfc7a2cca8f8e0b888c242959846a6fce03c72223"
-"checksum nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6c722bee1037d430d0f8e687bbdbf222f27cc6e4e68d5caf630857bb2b6dbdce"
-"checksum proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e98a83a9f9b331f54b924e68a66acb1bb35cb01fb0a23645139967abefb697e8"
-"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
-"checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
-"checksum redox_users 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "09b23093265f8d200fa7b4c2c76297f47e681c655f6f1285a8780d6a022f7431"
-"checksum rust-argon2 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2bc8af4bda8e1ff4932523b94d3dd20ee30a87232323eda55903ffd71d2fb017"
-"checksum rustyline 6.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de64be8eecbe428b6924f1d8430369a01719fbb182c26fa431ddbb0a95f5315d"
-"checksum rustyline-derive 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "69377056936308234fbb8f8789cada21b40b7796808a62783cdbe5c1315a0212"
-"checksum ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c92464b447c0ee8c4fb3824ecc8383b81717b9f1e74ba2e72540aef7b9f82997"
-"checksum serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)" = "9796c9b7ba2ffe7a9ce53c2287dfc48080f4b2b362fcc245a259b3a7201119dd"
-"checksum serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)" = "4b133a43a1ecd55d4086bd5b4dc6c1751c68b1bfbeba7a5040442022c7e7c02e"
-"checksum serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)" = "051c49229f282f7c6f3813f8286cc1e3323e8051823fce42c7ea80fe13521704"
-"checksum syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "66850e97125af79138385e9b88339cbcd037e3f28ceab8c5ad98e64f0f1f80bf"
-"checksum unic-char-property 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a8c57a407d9b6fa02b4795eb81c5b6652060a15a7903ea981f3d723e6c0be221"
-"checksum unic-char-range 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0398022d5f700414f6b899e10b8348231abf9173fa93144cbc1a43b9793c1fbc"
-"checksum unic-common 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "80d7ff825a6a654ee85a63e80f92f054f904f21e7d12da4e22f9834a4aaa35bc"
-"checksum unic-ucd-ident 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e230a37c0381caa9219d67cf063aa3a375ffed5bf541a452db16e744bdab6987"
-"checksum unic-ucd-version 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "96bd2f2237fe450fcd0a1d2f5f4e91711124f7857ba2e964247776ebeeb7b0c4"
-"checksum unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
-"checksum unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
-"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
-"checksum utf8parse 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8772a4ccbb4e89959023bc5b7cb8623a795caa7092d99f3aa9501b9484d4557d"
-"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
-"checksum wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)" = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
-"checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
-"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
deleted file mode 100644
index b5a9c4f15..000000000
--- a/rust/Cargo.toml
+++ /dev/null
@@ -1,13 +0,0 @@
-[workspace]
-
-members = [
-    "ast",
-    "driver",
-    "emitter",
-    "generated_parser",
-    "parser",
-    "interpreter",
-]
-
-[profile.release]
-debug = true  # enable debug symbols in release builds
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 000000000..87d3395ab
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,14 @@
+pub mod ast {
+    extern crate jsparagus_ast;
+    pub use self::jsparagus_ast::*;
+}
+
+pub mod emitter {
+    extern crate jsparagus_emitter;
+    pub use self::jsparagus_emitter::*;
+}
+
+pub mod parser {
+    extern crate jsparagus_parser;
+    pub use self::jsparagus_parser::*;
+}