diff --git a/pkgs/tools/filesystems/genromfs/default.nix b/pkgs/tools/filesystems/genromfs/default.nix
index db1968fccdc..7bf771803c6 100644
--- a/pkgs/tools/filesystems/genromfs/default.nix
+++ b/pkgs/tools/filesystems/genromfs/default.nix
@@ -10,7 +10,9 @@ stdenv.mkDerivation rec {
   };
 
   postPatch = ''
-    substituteInPlace Makefile --replace "prefix = /usr" "prefix = $out"
+    substituteInPlace Makefile \
+      --replace "prefix = /usr" "prefix = $out" \
+      --replace "gcc" "cc"
   '';
 
   meta = with stdenv.lib; {