feat(pkgs/zkm-rust): Implement fetching prebuilt zkm rust compiler v20241217 (v1.85.0)

Author: Syndamia

packages/all-packages.nix

@@ -222,6 +222,7 @@
         jolt-guest-rust = callPackage ./jolt-guest-rust/default.nix args-zkVM-rust;
         jolt = callPackage ./jolt/default.nix (args-zkVM // { inherit jolt-guest-rust; });
         zkm = callPackage ./zkm/default.nix args-zkVM;
+        zkm-rust = callPackage ./zkm-rust/default.nix args-zkVM-rust;
         nexus = callPackage ./nexus/default.nix args-zkVM;
         sp1-rust = callPackage ./sp1-rust/default.nix args-zkVM-rust;
         sp1 = callPackage ./sp1/default.nix (args-zkVM // { inherit sp1-rust; });

packages/zkm-rust/default.nix

@@ -0,0 +1,33 @@
+{ stdenv,
+  fetchGitHubReleaseAsset,
+  autoPatchelfHook,
+  zlib,
+  openssl,
+  ...
+}:
+stdenv.mkDerivation rec {
+  name = "risc0-rust";
+  version = "20241217";
+
+  nativeBuildInputs = [
+    autoPatchelfHook
+    stdenv.cc.cc.lib
+    zlib
+    openssl
+  ];
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out
+    cp -r ./rust-toolchain*/* $out/
+    runHook postInstall
+  '';
+
+  src = fetchGitHubReleaseAsset {
+    owner = "zkMIPS";
+    repo = "toolchain";
+    tag  = "${version}";
+    asset = "rust-toolchain-x86-64-unknown-linux-gnu-${version}.tar.xz";
+    hash = "sha256-XgR+nR5JwqGJ6Rx4cz65N2LTmGZDhBZ9ulXTIn5lW/Q=";
+  };
+}