diff --git a/pkgs/top-level/go-packages.nix b/pkgs/top-level/go-packages.nix
index df7d2709b52..908682d46b4 100644
--- a/pkgs/top-level/go-packages.nix
+++ b/pkgs/top-level/go-packages.nix
@@ -1701,11 +1701,14 @@ let
 
     # Mongodb incorrectly names all of their binaries main
     # Let's work around this with our own installer
-    buildPhase = ''
+    preInstall = ''
+      mkdir -p $bin/bin
       while read b; do
+        rm -f go/bin/main
         go install $goPackagePath/$b/main
-        mv go/bin/main go/bin/$b
+        cp go/bin/main $bin/bin/$b
       done < <(find go/src/$goPackagePath -name main | xargs dirname | xargs basename -a)
+      rm -r go/bin
     '';
   };