build(nix): use correct linker in main derivation compile

Cargo.toml

@@ -115,10 +115,6 @@ systems = ["x86_64-linux"]
 name = "veloren-nix"
 key = "veloren-nix.cachix.org-1:zokfKJqVsNV6kI/oJdLF6TYBdNPYGSb+diMVQPn/5Rc="
 
-[workspace.metadata.nix.crateOverride.veloren-network]
-buildInputs = ["openssl"]
-nativeBuildInputs = ["pkg-config"]
-
 [patch.crates-io]
 vek = { git = "https://github.com/yoanlcq/vek.git", rev = "84d5cb65841d46599a986c5477341bea4456be26" }
 # patch wgpu so we can use wgpu-profiler crate

flake.lock

@@ -90,11 +90,11 @@
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1662234098,
-        "narHash": "sha256-zl52sS2Jr2lOguuC4DpLYLU+JYFzjV0xaFycwllKFAE=",
+        "lastModified": 1662298979,
+        "narHash": "sha256-jHAqNmTGZb9xzUXlAjZcsOGgtsswRXw+eUUjk/wGFho=",
         "owner": "yusdacra",
         "repo": "nix-cargo-integration",
-        "rev": "3066def381d38288a9ecdf9a620fbb756c588ec1",
+        "rev": "a415e5728613de0fe596a4bebc04483074b1c1e0",
         "type": "github"
       },
       "original": {
@@ -127,11 +127,11 @@
     "rust-overlay": {
       "flake": false,
       "locked": {
-        "lastModified": 1662173844,
-        "narHash": "sha256-+ZgW98Y8fZkgFSylE+Mzalumw+kw3SVivZznbJqQaj8=",
+        "lastModified": 1662260299,
+        "narHash": "sha256-FYJk/Pn+VuSyl5Q3KXwTmOD7hprlv3CZPIRMGGT61IM=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "8ac6d40380dc4ec86f1ff591d5c14c8ae1d77a18",
+        "rev": "fe73170ff8b29c4230c26b85e82c25c73c35481d",
         "type": "github"
       },
       "original": {

flake.nix

@@ -27,6 +27,7 @@
         "CHANGELOG.md"
         "CODE_OF_CONDUCT.md"
         "clippy.toml"
+        ".cargo"
       ];
       ignorePaths = path: type: let
         split = lib.splitString "/" path;
@@ -114,19 +115,16 @@
         veloren-server-cli.wrapper = wrapWithAssets;
       };
       overrides = {
-        cCompiler = common: {
-          cCompiler = common.pkgs.clang;
-          useCCompilerBintools = true;
-        };
+        cCompiler = common: common.pkgs.clang;
         crates = common: prev: let
           pkgs = common.pkgs;
-          lib = pkgs.lib;
 
           configMoldLinker = ''
+            touch $CARGO_HOME/config.toml
             cat >>$CARGO_HOME/config.toml <<EOF
               [target.x86_64-unknown-linux-gnu]
               linker = "clang"
-              rustflags = ["-C", "link-arg=-fuse-ld=${lib.getExe pkgs.mold}"]
+              rustflags = ["-C", "link-arg=-fuse-ld=mold"]
             EOF
           '';
         in {
@@ -143,6 +141,10 @@
           veloren-voxygen-deps = oldAttrs: {
             doCheck = false;
 
+            nativeBuildInputs =
+              (oldAttrs.nativeBuildInputs or [])
+              ++ [pkgs.mold];
+
             postConfigure = ''
               ${oldAttrs.postConfigure or ""}
               ${configMoldLinker}
@@ -163,7 +165,7 @@
               );
             nativeBuildInputs =
               (oldAttrs.nativeBuildInputs or [])
-              ++ (with pkgs; [python3]);
+              ++ (with pkgs; [python3 pkg-config mold]);
 
             VELOREN_USERDATA_STRATEGY = "system";
             SHADERC_LIB_DIR = "${pkgs.shaderc.lib}/lib";