diff --git a/dist/index.js b/dist/index.js
index 601bcb6..4923f05 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -82174,8 +82174,9 @@ var require_versions = __commonJS({
         throw new Error(`Could not find version ${useVersion || version3} for platform ${host}`);
       }
       const downloadUrl = meta[host].tarball;
+      const fileWithoutFileType = downloadUrl.match(/.*\/(.*)(\.zip|\.tar\..*$)/)[1];
       const variantName = path2.basename(meta[host].tarball).replace(`.${ext}`, "").replace(/\+\S*$/, "");
-      return { downloadUrl, variantName, version: useVersion || version3 };
+      return { downloadUrl, fileWithoutFileType, variantName, version: useVersion || version3 };
     }
     __name(resolveVersion2, "resolveVersion");
     module2.exports = {
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..b9326aa
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,23 @@
+{
+  description = "Good basic flake template";
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+     flake-utils.lib.eachDefaultSystem (system:
+       let
+         systempkgs = nixpkgs.legacyPackages.${system};
+       in
+       {
+         devShells.default = systempkgs.mkShell {
+            buildInputs = with systempkgs; [
+              # specific nodejs versions available, e.g. nodejs_18
+              nodejs_20
+              nodePackages.typescript-language-server
+            ];
+         };
+       }
+     );
+}
diff --git a/test.js b/test.js
index 7418d53..16843be 100644
--- a/test.js
+++ b/test.js
@@ -32,36 +32,43 @@ async function test () {
 
   assert.deepEqual(await resolveVersion('x64', 'linux', '0.7.0'), {
     downloadUrl: 'https://ziglang.org/download/0.7.0/zig-linux-x86_64-0.7.0.tar.xz',
+    fileWithoutFileType: 'zig-linux-x86_64-0.7.0',
     variantName: 'zig-linux-x86_64-0.7.0',
     version: '0.7.0'
   })
   assert.deepEqual(await resolveVersion('x64', 'win32', '0.4.0'), {
     downloadUrl: 'https://ziglang.org/download/0.4.0/zig-windows-x86_64-0.4.0.zip',
+    fileWithoutFileType: 'zig-windows-x86_64-0.4.0',
     variantName: 'zig-windows-x86_64-0.4.0',
     version: '0.4.0'
   })
   assert.deepEqual(await resolveVersion('arm64', 'darwin', '0.11.0'), {
     downloadUrl: 'https://ziglang.org/download/0.11.0/zig-macos-aarch64-0.11.0.tar.xz',
+    fileWithoutFileType: 'zig-macos-aarch64-0.11.0',
     variantName: 'zig-macos-aarch64-0.11.0',
     version: '0.11.0'
   })
   assert.deepEqual(await resolveVersion('arm64', 'darwin', '2024.1.0-mach'), {
     downloadUrl: 'https://pkg.machengine.org/zig/zig-macos-aarch64-0.12.0-dev.2063+804cee3b9.tar.xz',
+    fileWithoutFileType: 'zig-macos-aarch64-0.12.0-dev.2063+804cee3b9',
     variantName: 'zig-macos-aarch64-0.12.0-dev.2063',
     version: '2024.1.0-mach'
   })
   assert.deepEqual(await resolveVersion('x64', 'linux', '2024.3.0-mach'), {
     downloadUrl: 'https://pkg.machengine.org/zig/zig-linux-x86_64-0.12.0-dev.3180+83e578a18.tar.xz',
+    fileWithoutFileType: 'zig-linux-x86_64-0.12.0-dev.3180+83e578a18',
     variantName: 'zig-linux-x86_64-0.12.0-dev.3180',
     version: '2024.3.0-mach'
   })
   assert.deepEqual(await resolveVersion('x64', 'win32', '2024.1.0-mach'), {
     downloadUrl: 'https://pkg.machengine.org/zig/zig-windows-x86_64-0.12.0-dev.2063+804cee3b9.zip',
+    fileWithoutFileType: 'zig-windows-x86_64-0.12.0-dev.2063+804cee3b9',
     variantName: 'zig-windows-x86_64-0.12.0-dev.2063',
     version: '2024.1.0-mach'
   })
   assert.deepEqual(await resolveVersion('arm64', 'darwin', '2024.3.0-mach'), {
     downloadUrl: 'https://pkg.machengine.org/zig/zig-macos-aarch64-0.12.0-dev.3180+83e578a18.tar.xz',
+    fileWithoutFileType: 'zig-macos-aarch64-0.12.0-dev.3180+83e578a18',
     variantName: 'zig-macos-aarch64-0.12.0-dev.3180',
     version: '2024.3.0-mach'
   })
diff --git a/versions.js b/versions.js
index 019cf4c..c1d6b0a 100644
--- a/versions.js
+++ b/versions.js
@@ -69,6 +69,7 @@ function getJSON (opts) {
   * to determine the appropriate downloadUrl, etc.
   *
   * @returns {string} download URL for the version
+  * @returns {string} file without file type (to match the function above)
   * @returns {string} variant name for the version - should be used as cache key
   * @returns {string} version name - use for display only
   */
@@ -108,13 +109,15 @@ async function resolveVersion (arch, platform, version) {
   }
 
   const downloadUrl = meta[host].tarball
+
+  const fileWithoutFileType = downloadUrl.match(/.*\/(.*)(\.zip|\.tar\..*$)/)[1]
   // If this is mach, we could end up with '+sha...' at the end of this, as
   // a version of '2024.1.0-mach' will resolve to a specific dev version
   // So, while the function is not called with "+...", we still have to deal with
   // it. This is important as it is used as the cache key
   const variantName = path.basename(meta[host].tarball).replace(`.${ext}`, '').replace(/\+\S*$/, '')
 
-  return { downloadUrl, variantName, version: useVersion || version }
+  return { downloadUrl, fileWithoutFileType, variantName, version: useVersion || version }
 }
 
 module.exports = {