diff --git a/bazel_tools/haskell-no-isystem.patch b/bazel_tools/haskell-no-isystem.patch
deleted file mode 100644
index ddb60ebee6..0000000000
--- a/bazel_tools/haskell-no-isystem.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/haskell/cc.bzl b/haskell/cc.bzl
-index c5888087..544f8124 100644
---- a/haskell/cc.bzl
-+++ b/haskell/cc.bzl
-@@ -67,7 +67,7 @@ def cc_interop_info(ctx):
-             ] + [
-                 f
-                 for include in cc_ctx.system_includes.to_list()
--                for f in ["-isystem", include]
-+                for f in ["-I", include]
-             ],
-         )
- 
diff --git a/deps.bzl b/deps.bzl
index 31e4fd0137..3bb0f3253f 100644
--- a/deps.bzl
+++ b/deps.bzl
@@ -75,9 +75,6 @@ def daml_deps():
                 "@com_github_digital_asset_daml//bazel_tools:haskell-windows-remove-fake-libs.patch",
                 # This is a daml specific patch and not upstreamable.
                 "@com_github_digital_asset_daml//bazel_tools:haskell-windows-extra-libraries.patch",
-                # This fixes a ghc-lib specific build issue and is not upstreamable.
-                # This might also be fixed by using `stack_snapshot` in the future.
-                "@com_github_digital_asset_daml//bazel_tools:haskell-no-isystem.patch",
                 # This should be made configurable in rules_haskell.
                 # Remove this patch once that's available.
                 "@com_github_digital_asset_daml//bazel_tools:haskell-opt.patch",