diff --git a/pkgs/misc/uml/default.nix b/pkgs/misc/uml/default.nix
index 06266cbb9b5..f420890e21f 100644
--- a/pkgs/misc/uml/default.nix
+++ b/pkgs/misc/uml/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, perl, m4}:
+{stdenv, fetchurl, perl, m4, gcc}:
 
 assert perl != null && m4 != null;
 
@@ -20,4 +20,5 @@ stdenv.mkDerivation {
 #  hostfsAccessPatch = ./hostfs-access.patch;
   config = ./config;
   buildInputs = [perl m4];
+  NIX_GCC = gcc;
 }
diff --git a/pkgs/system/all-packages-generic.nix b/pkgs/system/all-packages-generic.nix
index 438adcbae20..0b6699a2080 100644
--- a/pkgs/system/all-packages-generic.nix
+++ b/pkgs/system/all-packages-generic.nix
@@ -895,6 +895,7 @@ rec {
   uml = (import ../misc/uml) {
     inherit fetchurl stdenv perl;
     m4 = gnum4;
+    gcc = gcc33;
   };
 
   umlutilities = (import ../misc/uml-utilities) {