install: use nix profile

script.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+set -euo pipefail
+expr=$(mktemp)
+
+cleanup() {
+  rm -f "$expr"
+}
+
+cat >"$expr" <<'EOF'
+  { system ? builtins.currentSystem }:
+let
+  maybeStorePath = if builtins ? langVersion && builtins.lessThan 1 builtins.langVersion
+    then builtins.storePath
+    else x: x;
+  mkFakeDerivation = attrs: outputs:
+    let
+      outputNames = builtins.attrNames outputs;
+      common = attrs // outputsSet //
+        { type = "derivation";
+          outputs = outputNames;
+          all = outputsList;
+        };
+      outputToAttrListElement = outputName:
+        { name = outputName;
+          value = common // {
+            inherit outputName;
+            outPath = maybeStorePath (builtins.getAttr outputName outputs);
+          };
+        };
+      outputsList = map outputToAttrListElement outputNames;
+      outputsSet = builtins.listToAttrs outputsList;
+    in outputsSet;
+in
+
+{
+  "x86_64-linux" = (mkFakeDerivation {
+  name = "attic-static-x86_64-unknown-linux-musl-0.1.0";
+  system = "x86_64-linux";
+} {
+  out = "/nix/store/qi9cixkq0pj60yw1y5l28hid7f53310i-attic-static-x86_64-unknown-linux-musl-0.1.0";
+}).out;
+
+  "aarch64-linux" = (mkFakeDerivation {
+  name = "attic-0.1.0";
+  system = "aarch64-linux";
+} {
+  out = "/nix/store/ng1aykmyk7ayzrn69hlv4n4qzbywj5rk-attic-0.1.0";
+}).out;
+
+  "x86_64-darwin" = (mkFakeDerivation {
+  name = "attic-0.1.0";
+  system = "x86_64-darwin";
+} {
+  out = "/nix/store/zh35fhdyxnxzp1mjyla95g2yv2ayzc3f-attic-0.1.0";
+}).out;
+
+  "aarch64-darwin" = (mkFakeDerivation {
+  name = "attic-0.1.0";
+  system = "aarch64-darwin";
+} {
+  out = "/nix/store/z9i4grsf3h0wdlbhg95v6nanxiqx5xvp-attic-0.1.0";
+}).out;
+
+}.${system}
+
+EOF
+
+nix profile install --substituters "https://staging.attic.rs/attic-ci https://cache.nixos.org" --trusted-public-keys "attic-ci:U5Sey4mUxwBXM3iFapmP0/ogODXywKLRNgRPQpEXxbo= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" --file "$expr" --impure

src/stages/install.ts

@@ -10,7 +10,7 @@ export const install = async () => {
 
 	core.info("Installing attic");
 	const installScript = await fetch(
-		"https://raw.githubusercontent.com/zhaofengli/attic/main/.github/install-attic-ci.sh",
+		"https://git.naxdy.org/NaxdyOrg/attic-action/raw/branch/main/script.sh",
 	).then((r) => {
 		if (!r.ok) {
 			core.setFailed(`Action failed with error: ${r.statusText}`);