diff --git a/pkgs/os-specific/linux/kernel/manual-config.nix b/pkgs/os-specific/linux/kernel/manual-config.nix
index 59fb1a6cd4c8..5aee2c194b63 100644
--- a/pkgs/os-specific/linux/kernel/manual-config.nix
+++ b/pkgs/os-specific/linux/kernel/manual-config.nix
@@ -113,6 +113,8 @@ stdenv.mkDerivation ({
     cd ..
     mv $sourceRoot $out/lib/modules/${modDirVersion}/source
     mv build $out/lib/modules/${modDirVersion}/build
+    unlink $out/lib/modules/${modDirVersion}/build/source
+    ln -sv $out/lib/modules/${modDirVersion}/{,build/}source
   '';
 
   postFixup = ''