diff --git a/flake.nix b/flake.nix
index 2de341785..937780c91 100644
--- a/flake.nix
+++ b/flake.nix
@@ -23,6 +23,7 @@
       devShells = forAllSystems (system:
         let
           pkgs = pkgsFor.${system};
+          extras = if pkgs.stdenv.isDarwin then [ "psycopg-c" ] else [ "psycopg-binary" ];
         in
         rec {
           evap = pkgs.callPackage ./nix/shell.nix {
@@ -30,6 +31,7 @@
             poetry2nix = inputs.poetry2nix.lib.mkPoetry2Nix { inherit pkgs; };
             pyproject = ./pyproject.toml;
             poetrylock = ./poetry.lock;
+            inherit extras;
           };
           evap-dev = evap.override { poetry-groups = [ "dev" ]; };
           default = evap-dev;
diff --git a/nix/shell.nix b/nix/shell.nix
index fc89d5e60..7ea4a9add 100644
--- a/nix/shell.nix
+++ b/nix/shell.nix
@@ -1,4 +1,4 @@
-{ pkgs, python3, poetry2nix, pyproject, poetrylock, poetry-groups ? [ ], extraPackages ? [ ], extraPythonPackages ? (ps: [ ]), ... }:
+{ pkgs, lib ? pkgs.lib, python3, poetry2nix, pyproject, poetrylock, extras ? [ ], poetry-groups ? [ ], extraPackages ? [ ], extraPythonPackages ? (ps: [ ]), ... }:
 
 let
   # When running a nix shell, XDG_DATA_DIRS will be populated so that bash_completion can (lazily) find this completion script
@@ -17,11 +17,22 @@ let
   poetry-env = poetry2nix.mkPoetryEnv {
     python = python3;
     # We pass these instead of `projectDir` to avoid adding the dependency on other files.
-    inherit pyproject poetrylock;
+    inherit pyproject poetrylock extras;
     preferWheels = true;
     overrides = poetry2nix.overrides.withDefaults (final: prev: {
       # https://github.com/nix-community/poetry2nix/issues/1499
       django-stubs-ext = prev.django-stubs-ext.override { preferWheel = false; };
+
+      psycopg = prev.psycopg.overridePythonAttrs (old: {
+        buildInputs = old.buildInputs or [ ]
+          ++ lib.optionals pkgs.stdenv.isDarwin [ pkgs.openssl ];
+        propagatedBuildInputs = old.propagatedBuildInputs or [ ] ++ [ pkgs.postgresql ];
+      });
+
+      psycopg-c = prev.psycopg-c.overridePythonAttrs (old: {
+        nativeBuildInputs = old.nativeBuildInputs or [ ] ++ [ pkgs.postgresql ];
+        propagatedBuildInputs = old.propagatedBuildInputs or [ ] ++ [ final.setuptools ];
+      });
     });
     groups = poetry-groups;
     checkGroups = [ ]; # would otherwise always install dev-dependencies
diff --git a/poetry.lock b/poetry.lock
index 4484b7305..f262f98c1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -824,7 +824,6 @@ files = [
 ]
 
 [package.dependencies]
-psycopg-binary = {version = "3.2.3", optional = true, markers = "implementation_name != \"pypy\" and extra == \"binary\""}
 typing-extensions = {version = ">=4.6", markers = "python_version < \"3.13\""}
 tzdata = {version = "*", markers = "sys_platform == \"win32\""}
 
@@ -840,7 +839,7 @@ test = ["anyio (>=4.0)", "mypy (>=1.11)", "pproxy (>=2.7)", "pytest (>=6.2.5)",
 name = "psycopg-binary"
 version = "3.2.3"
 description = "PostgreSQL database adapter for Python -- C optimisation distribution"
-optional = false
+optional = true
 python-versions = ">=3.8"
 files = [
     {file = "psycopg_binary-3.2.3-cp310-cp310-macosx_12_0_x86_64.whl", hash = "sha256:965455eac8547f32b3181d5ec9ad8b9be500c10fe06193543efaaebe3e4ce70c"},
@@ -909,6 +908,16 @@ files = [
     {file = "psycopg_binary-3.2.3-cp39-cp39-win_amd64.whl", hash = "sha256:e56b1fd529e5dde2d1452a7d72907b37ed1b4f07fdced5d8fb1e963acfff6749"},
 ]
 
+[[package]]
+name = "psycopg-c"
+version = "3.2.3"
+description = "PostgreSQL database adapter for Python -- C optimisation distribution"
+optional = true
+python-versions = ">=3.8"
+files = [
+    {file = "psycopg_c-3.2.3.tar.gz", hash = "sha256:06ae7db8eaec1a3845960fa7f997f4ccdb1a7a7ab8dc593a680bcc74e1359671"},
+]
+
 [[package]]
 name = "pycparser"
 version = "2.22"
@@ -1265,7 +1274,11 @@ files = [
     {file = "xlwt-1.3.0.tar.gz", hash = "sha256:c59912717a9b28f1a3c2a98fd60741014b06b043936dcecbc113eaaada156c88"},
 ]
 
+[extras]
+psycopg-binary = ["psycopg-binary"]
+psycopg-c = ["psycopg-c"]
+
 [metadata]
 lock-version = "2.0"
 python-versions = "~3.10.0"
-content-hash = "9554e9cb984e6e02b5b1c80f139eda4b3a864ef09c30824d00633d1eadceeb3f"
+content-hash = "d800aac484055ba0b004eeac5f3130a35295ffb650fce69ac4576bbfe6bd107f"
diff --git a/pyproject.toml b/pyproject.toml
index 26cb455c4..14f09792f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,9 @@ django-fsm = "~2.8.2"
 Django = "~5.1.0"
 mozilla-django-oidc = "~4.0.1"
 openpyxl = "~3.1.5"
-psycopg = { version = "~3.2.3", extras = ["binary"] }
+psycopg = "~3.2.3"
+psycopg-c = { version = "~3.2.3", optional = true }
+psycopg-binary = { version = "~3.2.3", optional = true }
 redis = "~5.2.0"
 typing-extensions = "~4.12.2"
 xlwt = "~1.3.0"
@@ -34,6 +36,10 @@ tblib = "~3.0.0"
 xlrd = "~2.0.1"
 typeguard = "~4.4.0"
 
+[tool.poetry.extras]
+psycopg-c = ["psycopg-c"]
+psycopg-binary = ["psycopg-binary"]
+
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"