diff --git a/pkgs/build-support/bintools-wrapper/default.nix b/pkgs/build-support/bintools-wrapper/default.nix
index 195a7091242a..4618b1cbba52 100644
--- a/pkgs/build-support/bintools-wrapper/default.nix
+++ b/pkgs/build-support/bintools-wrapper/default.nix
@@ -492,7 +492,7 @@ stdenvNoCC.mkDerivation {
         darwinMinVersionVariable
         ;
     }
-    // lib.optionalAttrs (apple-sdk != null && stdenvNoCC.targetPlatform.isDarwin) {
+    // lib.optionalAttrs (stdenvNoCC.targetPlatform.isDarwin && apple-sdk != null) {
       # Wrapped compilers should do something useful even when no SDK is provided at `DEVELOPER_DIR`.
       fallback_sdk = apple-sdk.__spliced.buildTarget or apple-sdk;
     };
diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix
index f12fe4d18bec..b9df3fc1b2b0 100644
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@@ -889,7 +889,7 @@ stdenvNoCC.mkDerivation {
       # These will become empty strings when not targeting Darwin.
       inherit (targetPlatform) darwinMinVersion darwinMinVersionVariable;
     }
-    // lib.optionalAttrs (apple-sdk != null && stdenvNoCC.targetPlatform.isDarwin) {
+    // lib.optionalAttrs (stdenvNoCC.targetPlatform.isDarwin && apple-sdk != null) {
       # Wrapped compilers should do something useful even when no SDK is provided at `DEVELOPER_DIR`.
       fallback_sdk = apple-sdk.__spliced.buildTarget or apple-sdk;
     };