--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9,6 +9,8 @@
 { pkgs
 , stdenv
 , python
+, overrideCC
+, gcc5
 , overrides ? (self: super: {})
 }:

@@ -9230,7 +9232,10 @@ in {
     };
   };

-  pytorch = callPackage ../development/python-modules/pytorch { };
+  pytorch = callPackage ../development/python-modules/pytorch {
+    stdenv = overrideCC stdenv gcc5;
+    gcc = gcc5;
+  };