more balls

flake.nix

@@ -1,16 +1,16 @@
 {
-  description = "A Nix-flake-based Rust development environment with build and run support";
+  description = "A Nix-flake-based Rust development environment";
 
   inputs = {
-    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*"; # unstable
-
+    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1"; # unstable Nixpkgs
     fenix = {
-      url = "https://flakehub.com/f/nix-community/fenix/0.1.*";
+      url = "https://flakehub.com/f/nix-community/fenix/0.1";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
-  outputs = { self, nixpkgs, fenix }:
+  outputs =
+    { self, ... }@inputs:
     let
       supportedSystems = [
         "x86_64-linux"
@@ -18,13 +18,16 @@
         "x86_64-darwin"
         "aarch64-darwin"
       ];
-
-      forEachSupportedSystem = f:
-        nixpkgs.lib.genAttrs supportedSystems (system:
+      forEachSupportedSystem =
+        f:
+        inputs.nixpkgs.lib.genAttrs supportedSystems (
+          system:
           f {
-            pkgs = import nixpkgs {
+            pkgs = import inputs.nixpkgs {
               inherit system;
-              overlays = [ self.overlays.default ];
+              overlays = [
+                inputs.self.overlays.default
+              ];
             };
           }
         );
@@ -32,72 +35,70 @@
     {
       overlays.default = final: prev: {
         rustToolchain =
-          with fenix.packages.${prev.stdenv.hostPlatform.system};
-          combine (with stable; [
-            cargo
-            rustc
-            clippy
-            rustfmt
-            rust-src
-          ]);
+          with inputs.fenix.packages.${prev.stdenv.hostPlatform.system};
+          combine (
+            with stable;
+            [
+              clippy
+              rustc
+              cargo
+              rustfmt
+              rust-src
+            ]
+          );
       };
 
       packages = forEachSupportedSystem ({ pkgs }: {
-        default = pkgs.rustPlatform.buildRustPackage {
-          pname = "whereAmI";
-          version = "0.1.0";
+        default =
+          pkgs.rustPlatform.buildRustPackage {
+            pname = "my-rust-project"; # Change to your Cargo.toml [package] name if different
+            version = "0.1.0";         # Change to your Cargo.toml [package] version
 
-          # Keep Cargo.lock even if gitignored
-          src = pkgs.lib.cleanSourceWith {
-            src = ./.;
-            filter = path: type:
-              let
-                name = pkgs.lib.baseNameOf path;
-              in
-                name == "Cargo.lock"
-                || pkgs.lib.cleanSourceFilter path type;
+            src = pkgs.lib.cleanSource ./.;
+
+            cargoLock = {
+              lockFile = ./Cargo.lock;
+              # If you have additional lock files (e.g., for alternative registries), add them here
+            };
+
+            nativeBuildInputs = with pkgs; [
+              pkg-config
+            ];
+
+            buildInputs = with pkgs; [
+              openssl
+            ];
+
+            # Optional: for faster iterative development, you can copy artifacts from cargo
+            # doCheck = false; # if you want to skip tests during nix build
+
+            meta = with pkgs.lib; {
+              description = "My Rust project";
+              license = licenses.mit; # Adjust as needed
+              mainProgram = "whereAmI"; # Optional: name of the main binary for nix run
+            };
           };
-
-          cargoLock = {
-            lockFile = ./Cargo.lock;
-          };
-
-          nativeBuildInputs = [
-            pkgs.pkg-config
-          ];
-
-          buildInputs = [
-            pkgs.openssl
-          ];
-
-          meta = with pkgs.lib; {
-            description = "A simple Rust program to show current location info";
-            mainProgram = "whereAmI";
-            license = licenses.mit;
-            maintainers = [ ];
-          };
-        };
       });
 
-      devShells = forEachSupportedSystem ({ pkgs }: {
-        default = pkgs.mkShell {
-          packages = with pkgs; [
-            rustToolchain
-            openssl
-            pkg-config
-            cargo-deny
-            cargo-edit
-            cargo-watch
-            rust-analyzer
-          ];
-
-          env = {
-            # Needed for rust-analyzer stdlib discovery
-            RUST_SRC_PATH =
-              "${pkgs.rustToolchain}/lib/rustlib/src/rust/library";
+      devShells = forEachSupportedSystem (
+        { pkgs }:
+        {
+          default = pkgs.mkShell {
+            packages = with pkgs; [
+              rustToolchain
+              openssl
+              pkg-config
+              cargo-deny
+              cargo-edit
+              cargo-watch
+              rust-analyzer
+            ];
+            env = {
+              # Required by rust-analyzer
+              RUST_SRC_PATH = "${pkgs.rustToolchain}/lib/rustlib/src/rust/library";
+            };
           };
-        };
-      });
+        }
+      );
     };
 }
-