diff --git a/wfvm/bundle/default.nix b/wfvm/bundle/default.nix
index 0e76874..16a0fed 100644
--- a/wfvm/bundle/default.nix
+++ b/wfvm/bundle/default.nix
@@ -1,7 +1,10 @@
 { pkgs }:
 
 pkgs.runCommandNoCC "win-bundle-installer.exe" {} ''
+  mkdir bundle
+  cd bundle
+  cp ${./go.mod} go.mod
   cp ${./main.go} main.go
   env HOME=$(mktemp -d) GOOS=windows GOARCH=amd64 ${pkgs.go}/bin/go build
-  mv build.exe $out
+  mv bundle.exe $out
 ''
diff --git a/wfvm/bundle/go.mod b/wfvm/bundle/go.mod
new file mode 100644
index 0000000..e2049f7
--- /dev/null
+++ b/wfvm/bundle/go.mod
@@ -0,0 +1,3 @@
+module bundle
+
+go 1.11