diff --git a/pkgs/build-support/bintools-wrapper/default.nix b/pkgs/build-support/bintools-wrapper/default.nix
index 736494b5ee55..1d907aa31f48 100644
--- a/pkgs/build-support/bintools-wrapper/default.nix
+++ b/pkgs/build-support/bintools-wrapper/default.nix
@@ -343,10 +343,6 @@ stdenvNoCC.mkDerivation {
       done
     ''
 
-    + optionalString targetPlatform.isDarwin ''
-      echo "-arch ${targetPlatform.darwinArch}" >> $out/nix-support/libc-ldflags
-    ''
-
     ##
     ## GNU specific extra strip flags
     ##
diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix
index 6caf5103325a..d9174df31a2a 100644
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@@ -696,10 +696,6 @@ stdenvNoCC.mkDerivation {
       done
     ''
 
-    + optionalString targetPlatform.isDarwin ''
-        echo "-arch ${targetPlatform.darwinArch}" >> $out/nix-support/cc-cflags
-    ''
-
     + optionalString targetPlatform.isAndroid ''
       echo "-D__ANDROID_API__=${targetPlatform.androidSdkVersion}" >> $out/nix-support/cc-cflags
     ''