diff --git a/nix/package.nix b/nix/package.nix
index b9de5b4..b63886d 100644
--- a/nix/package.nix
+++ b/nix/package.nix
@@ -17,15 +17,16 @@ in
       fs.toSource {
         root = s;
         fileset = fs.unions [
-          (fs.fileFilter (file: builtins.any file.hasExt ["rs"]) s + /src)
+          (fs.fileFilter (file: builtins.any file.hasExt ["rs"]) (s + /src))
           lockfile
           cargoToml
         ];
       };
 
     postInstall = ''
-      mkdir -p $out/share
-      install -Dm755 ${../contrib} $out/share/contrib
+      mkdir -p $out/share/contrib
+      cp -r ${../contrib}/corpus $out/share/contrib/
+      cp -r ${../contrib}/lua $out/share/contrib/
     '';
 
     cargoLock.lockFile = lockfile;