diff --git a/pkgs/all-packages.nix b/pkgs/all-packages.nix
index 09c347c..03f9619 100644
--- a/pkgs/all-packages.nix
+++ b/pkgs/all-packages.nix
@@ -30,7 +30,7 @@ self: super: pkgs: with pkgs; {
 
   inherit (callPackage ./opengl/default.nix { inherit super; }) libGL mesa_glxgallium;
 
-  openfoam = callPackage ./openfoam { };
+  openfoam = callPackage ./openfoam { stdenv = overrideCC stdenv gcc7; };
 
   openslide = callPackage ./openslide { };