diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 87a9cd51e7f..61c1647b4ca 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -27821,6 +27821,7 @@ in
 
   mxnet = callPackage ../applications/science/math/mxnet {
     inherit (linuxPackages) nvidia_x11;
+    stdenv = gcc9Stdenv;
   };
 
   wxmaxima = callPackage ../applications/science/math/wxmaxima { wxGTK = wxGTK30; };