diff --git a/R/install-plan.R b/R/install-plan.R
index 137109df..fa5d104d 100644
--- a/R/install-plan.R
+++ b/R/install-plan.R
@@ -236,7 +236,6 @@ handle_event <- function(state, evidx) {
   worker <- state$workers[[evidx]]
   state$workers[evidx] <- list(NULL)
 
-  ## Post-process, this will throw on error
   if (is.function(proc$get_result)) proc$get_result()
 
   ## Cut stdout to lines
@@ -690,6 +689,7 @@ stop_task_build <- function(state, worker) {
   version <- state$plan$version[pkgidx]
   time <- Sys.time() - state$plan$build_time[[pkgidx]]
   ptime <- format_time$pretty_sec(as.numeric(time, units = "secs"))
+  prms <- state$plan$params[[pkgidx]]
 
   if (success) {
     alert("success", paste0(
@@ -699,7 +699,14 @@ stop_task_build <- function(state, worker) {
     ## Need to save the name of the built package
     state$plan$file[pkgidx] <- worker$process$get_built_file()
   } else {
-    alert("danger", "Failed to build {.pkg {pkg}} {.version {version}}")
+    ignore_error <- is_true_param(prms, "ignore-build-errors")
+    alert(
+      if (ignore_error) "warning" else "danger",
+      paste0(
+        "Failed to build {.pkg {pkg}} {.version {version}}",
+        if (isTRUE(state$config$show_time)) " {.timestamp {ptime}}"
+      )
+    )
   }
   update_progress_bar(state, 1L)
 
@@ -709,7 +716,14 @@ stop_task_build <- function(state, worker) {
   state$plan$build_stdout[[pkgidx]] <- worker$stdout
   state$plan$worker_id[[pkgidx]] <- NA_character_
 
-  if (!success) {
+  if (success) {
+    # do nothing
+  } else if (ignore_error) {
+    # upstream will probably fail as well, but march on, neverthelesss
+    state$plan$install_done[[pkgidx]] <- TRUE
+    ## Need to remove from the dependency list
+    state$plan$deps_left <- lapply(state$plan$deps_left, setdiff, pkg)
+  } else {
     throw(pkg_error(
       "Failed to build source package {.pkg {pkg}}.",
       .data = list(
@@ -722,8 +736,7 @@ stop_task_build <- function(state, worker) {
     ))
   }
 
-  prms <- state$plan$params[[pkgidx]]
-  if (!is.null(state$cache) && !is_true_param(prms, "nocache")) {
+  if (success && !is.null(state$cache) && !is_true_param(prms, "nocache")) {
     ptfm <- current_r_platform()
     rv <- current_r_version()
     target <- paste0(state$plan$target[pkgidx], "-", ptfm, "-", rv)
diff --git a/R/parse-remotes.R b/R/parse-remotes.R
index 39a28528..2e3142ee 100644
--- a/R/parse-remotes.R
+++ b/R/parse-remotes.R
@@ -272,8 +272,8 @@ add_ref_params <- function(res, params) {
   res
 }
 
-known_query_params <- c("ignore", "ignore-before-r", "nocache",
-                        "reinstall", "source")
+known_query_params <- c("ignore", "ignore-before-r", "ignore-build-errors",
+                        "nocache", "reinstall", "source")
 
 parse_query <- function(ref) {
   query <- sub("^[^?]*(\\?|$)", "", ref)
diff --git a/tests/testthat/_snaps/install-plan.md b/tests/testthat/_snaps/install-plan.md
index ffb8d589..0af15442 100644
--- a/tests/testthat/_snaps/install-plan.md
+++ b/tests/testthat/_snaps/install-plan.md
@@ -59,3 +59,35 @@
       character(0)
       
 
+# ignore-build-errors parameter
+
+    Code
+      suppressMessages(inst$solve())
+      suppressMessages(inst$download())
+      inst$install()
+    Message
+      i Packaging badbuild 1.0.0
+      v Packaged badbuild 1.0.0
+      i Building badbuild 1.0.0
+      x Failed to build badbuild 1.0.0
+    Condition
+      Error:
+      ! Failed to build source package badbuild.
+
+---
+
+    Code
+      suppressMessages(inst$solve())
+      suppressMessages(inst$download())
+      inst$install()
+    Message
+      i Packaging badbuild 1.0.0
+      v Packaged badbuild 1.0.0
+      i Building badbuild 1.0.0
+      ! Failed to build badbuild 1.0.0
+      i Packaging goodbuild 1.0.0
+      v Packaged goodbuild 1.0.0
+      i Building goodbuild 1.0.0
+      ! Failed to build goodbuild 1.0.0
+      v Summary:   2 new
+
diff --git a/tests/testthat/fixtures/packages/badbuild/DESCRIPTION b/tests/testthat/fixtures/packages/badbuild/DESCRIPTION
new file mode 100644
index 00000000..d5f983b8
--- /dev/null
+++ b/tests/testthat/fixtures/packages/badbuild/DESCRIPTION
@@ -0,0 +1,9 @@
+Package: badbuild
+Title: Title
+Version: 1.0.0
+Author: Gábor Csárdi
+Maintainer: Gábor Csárdi <csardi.gabor@gmail.com>
+Description: Test package.
+License: MIT + file LICENSE
+LazyData: true
+Encoding: UTF-8
diff --git a/tests/testthat/fixtures/packages/badbuild/NAMESPACE b/tests/testthat/fixtures/packages/badbuild/NAMESPACE
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/testthat/fixtures/packages/badbuild/R/foo.R b/tests/testthat/fixtures/packages/badbuild/R/foo.R
new file mode 100644
index 00000000..2e32b340
--- /dev/null
+++ b/tests/testthat/fixtures/packages/badbuild/R/foo.R
@@ -0,0 +1,2 @@
+This is an error, sorry!
+fun <- function() NULL
diff --git a/tests/testthat/fixtures/packages/goodbuild/DESCRIPTION b/tests/testthat/fixtures/packages/goodbuild/DESCRIPTION
new file mode 100644
index 00000000..257e905b
--- /dev/null
+++ b/tests/testthat/fixtures/packages/goodbuild/DESCRIPTION
@@ -0,0 +1,11 @@
+Package: goodbuild
+Title: Title
+Version: 1.0.0
+Author: Gábor Csárdi
+Maintainer: Gábor Csárdi <csardi.gabor@gmail.com>
+Description: Test package.
+License: MIT + file LICENSE
+LazyData: true
+Imports:
+  badbuild
+Encoding: UTF-8
diff --git a/tests/testthat/fixtures/packages/goodbuild/NAMESPACE b/tests/testthat/fixtures/packages/goodbuild/NAMESPACE
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/testthat/fixtures/packages/goodbuild/R/foo.R b/tests/testthat/fixtures/packages/goodbuild/R/foo.R
new file mode 100644
index 00000000..425b6487
--- /dev/null
+++ b/tests/testthat/fixtures/packages/goodbuild/R/foo.R
@@ -0,0 +1 @@
+fun <- function() NULL
diff --git a/tests/testthat/test-install-plan.R b/tests/testthat/test-install-plan.R
index 2987fd7b..166379ae 100644
--- a/tests/testthat/test-install-plan.R
+++ b/tests/testthat/test-install-plan.R
@@ -124,6 +124,34 @@ test_that("add_recursive_dependencies", {
   expect_snapshot(add_recursive_dependencies(plan)$dependencies)
 })
 
+test_that("ignore-build-errors parameter", {
+  setup_fake_apps()
+  local_cli_config()
+  dir.create(tmplib <- tempfile())
+  on.exit(rimraf(tmplib), add = TRUE)
+  pkgdir1 <- test_path("fixtures", "packages", "badbuild")
+  pkgdir2 <- test_path("fixtures", "packages", "goodbuild")
+  inst <- new_pkg_installation_proposal(
+    paste0("local::", c(pkgdir1, pkgdir2), "?nocache"),
+    config = list(library = tmplib, platforms = "source")
+  )
+  expect_snapshot({
+    suppressMessages(inst$solve())
+    suppressMessages(inst$download())
+    inst$install()
+  }, error = TRUE)
+
+  inst <- new_pkg_installation_proposal(
+    paste0("local::", c(pkgdir1, pkgdir2), "?nocache&ignore-build-errors"),
+    config = list(library = tmplib, platforms = "source")
+  )
+  expect_snapshot({
+    suppressMessages(inst$solve())
+    suppressMessages(inst$download())
+    inst$install()
+  })
+})
+
 test_that("install package from GH", {
   setup_fake_apps()
   setup_fake_gh_app()