flake tweak

Author: alskipp

flake.nix

@@ -21,12 +21,28 @@
         overlays = [rust-overlay.overlays.default];
         pkgs = import nixpkgs {inherit overlays system;};
 
+        # Cross-compilation setup for musl
+        pkgsCross = import nixpkgs {
+          inherit overlays;
+          localSystem = system;
+          crossSystem = {
+            config = "x86_64-unknown-linux-musl";
+            isStatic = true;
+          };
+        };
+
         rust = pkgs.rust-bin.stable.latest.default.override {extensions = ["rust-src"];};
         rustPlatform = pkgs.makeRustPlatform {
           cargo = rust;
           rustc = rust;
         };
 
+        # Use cross-compiled rustPlatform for musl builds
+        rustPlatformCross = pkgsCross.makeRustPlatform {
+          cargo = rust;
+          rustc = rust;
+        };
+
         manifest = (pkgs.lib.importTOML ./Cargo.toml).package;
       in {
         # `nix develop`.
@@ -75,24 +91,20 @@
           };
 
           # Static musl build for Linux distribution
-          anonymiser-musl = rustPlatform.buildRustPackage {
+          anonymiser-musl = rustPlatformCross.buildRustPackage {
             pname = "${manifest.name}-musl";
             version = manifest.version;
             src = pkgs.nix-gitignore.gitignoreSource [] ./.;
             cargoLock.lockFile = ./Cargo.lock;
 
-            # Target musl for static linking
-            CARGO_BUILD_TARGET = "x86_64-unknown-linux-musl";
-            CARGO_BUILD_RUSTFLAGS = "-C target-feature=+crt-static";
-
             # Compile-time dependencies.
             nativeBuildInputs = with pkgs; [
               pkg-config
               cmake
               perl # Required for vendored OpenSSL build
             ];
 
-            # With vendored OpenSSL, we don't need runtime dependencies
+            # With vendored OpenSSL and static linking, we don't need runtime dependencies
             buildInputs = [];
 
             checkFlags = [