diff --git a/pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix b/pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix
index 7c48d695e11d13e..1e7aeb3689ea9ee 100644
--- a/pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix
+++ b/pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, ninja, python3, curl, libxml2, objc4, ICU }:
+{ lib, stdenv, fetchFromGitHub, fetchurl, makeSetupHook, ninja, python3, curl, libxml2, objc4, ICU }:
 
 let
   # 10.12 adds a new sysdir.h that our version of CF in the main derivation depends on, but
@@ -104,4 +104,6 @@ stdenv.mkDerivation {
       ln -s Versions/Current/$i $base/$i
     done
   '';
+
+    darwinEnvHook = makeSetupHook { name = "darwin-env-hook"; } ./pure-corefoundation-hook.sh;
 }
diff --git a/pkgs/os-specific/darwin/swift-corelibs/pure-corefoundation-hook.sh b/pkgs/os-specific/darwin/swift-corelibs/pure-corefoundation-hook.sh
new file mode 100644
index 000000000000000..d5539f50861a4ad
--- /dev/null
+++ b/pkgs/os-specific/darwin/swift-corelibs/pure-corefoundation-hook.sh
@@ -0,0 +1,7 @@
+usePureCoreFoundation() {
+# Avoid overriding value set by the impure CF
+    if [ -z "${NIX_COREFOUNDATION_RPATH:-}" ]; then
+        export NIX_COREFOUNDATION_RPATH=@out@/Library/Frameworks
+    fi
+}
+addEnvHooks "$hostOffset" usePureCoreFoundation