diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 25d06bfe593..8c5b162eba1 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -683,10 +683,10 @@ rec {
     profiledCompiler = false;
   }));
 
-  gcc42 = wrapGCC (import ../development/compilers/gcc-4.2 {
+  gcc42 = lowPrio (wrapGCC (import ../development/compilers/gcc-4.2 {
     inherit fetchurl stdenv noSysDirs;
     profiledCompiler = true;
-  });
+  }));
 
   gccApple = wrapGCC (import ../development/compilers/gcc-apple {
     inherit fetchurl stdenv noSysDirs;