feat(nix): add derivation

nix/derivation.nix

@@ -0,0 +1,63 @@
+{
+  lib,
+  stdenvNoCC,
+  bun,
+  nodejs,
+}: stdenvNoCC.mkDerivation (finalAttrs: {
+    pname = "tcl-guessr";
+    version = "0.0.1";
+
+    src = ../.;
+
+    nativeBuildInputs = [bun nodejs];
+
+    bunDeps = stdenvNoCC.mkDerivation {
+      pname = "${finalAttrs.pname}-bun-deps";
+      inherit (finalAttrs) version;
+
+      nativeBuildInputs = [bun];
+
+      src = lib.fileset.toSource {
+        root = finalAttrs.src;
+        fileset = lib.fileset.unions [
+          ../package.json
+          ../bun.lockb
+          ../patches
+        ];
+      };
+
+      dontConfigure = true;
+      dontBuild = true;
+
+      installPhase = ''
+        bun install \
+          --frozen-lockfile \
+          --ignore-scripts \
+          --backend copyfile \
+          --force
+
+        cp -r node_modules/ $out
+      '';
+
+      outputHashMode = "recursive";
+      outputHash = "sha256-cYbyVt2Hc96WRAIsNkgnG0vUB47m1ixbhYhHmXetaII=";
+    };
+
+    configurePhase = ''
+      cp -r $bunDeps node_modules
+      chmod -R +w node_modules
+      patchShebangs node_modules/{*,.*}
+    '';
+
+    buildPhase = ''
+      bun run build
+    '';
+
+    installPhase = ''
+      cp -r .svelte-kit/cloudflare $out
+    '';
+
+    passthru = {
+      inherit (finalAttrs) bunDeps;
+    };
+  })