nix: refactor

- Remove unnecessary fenix input
- Remove unnecessary arguments to buildRustPackage
- Remove obsolete/unnecessary hacks
- Minimize code duplication and maximize re-use by using flake.parts
- Split out stardust-xr-server derivation into its own nix file in nix/stardust-xr-server
- Automatically get name of package from Cargo.toml
- Advertise support for riscv64-linux in flake outputs

flake.lock

@@ -1,33 +1,12 @@
 {
   "nodes": {
     "fenix": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "rust-analyzer-src": "rust-analyzer-src"
-      },
-      "locked": {
-        "lastModified": 1691389274,
-        "narHash": "sha256-0lISOvDDoqOfauZctSKb6EvW1Mg1aPI0869Tx3xtEyw=",
-        "owner": "nix-community",
-        "repo": "fenix",
-        "rev": "bd0c7ee0836a814751c3fcf66eaadfbe1a35b715",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "fenix",
-        "type": "github"
-      }
-    },
-    "fenix_2": {
       "inputs": {
         "nixpkgs": [
           "flatland",
           "nixpkgs"
         ],
-        "rust-analyzer-src": "rust-analyzer-src_2"
+        "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
         "lastModified": 1678775037,
@@ -47,6 +26,24 @@
       "inputs": {
         "nixpkgs-lib": "nixpkgs-lib"
       },
+      "locked": {
+        "lastModified": 1690933134,
+        "narHash": "sha256-ab989mN63fQZBFrkk4Q8bYxQCktuHmBIBqUG1jl6/FQ=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "59cf3f1447cfc75087e7273b04b31e689a8599fb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "flake-parts_2": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib_2"
+      },
       "locked": {
         "lastModified": 1688466019,
         "narHash": "sha256-VeM2akYrBYMsb4W/MmBo1zmaMfgbL4cH3Pu8PGyIwJ0=",
@@ -60,7 +57,7 @@
         "type": "indirect"
       }
     },
-    "flake-parts_2": {
+    "flake-parts_3": {
       "inputs": {
         "nixpkgs-lib": [
           "hercules-ci-effects",
@@ -84,7 +81,7 @@
     },
     "flatland": {
       "inputs": {
-        "fenix": "fenix_2",
+        "fenix": "fenix",
         "nixpkgs": "nixpkgs"
       },
       "locked": {
@@ -119,7 +116,7 @@
     },
     "hercules-ci-agent": {
       "inputs": {
-        "flake-parts": "flake-parts_2",
+        "flake-parts": "flake-parts_3",
         "haskell-flake": "haskell-flake",
         "nixpkgs": "nixpkgs_2"
       },
@@ -138,7 +135,7 @@
     },
     "hercules-ci-effects": {
       "inputs": {
-        "flake-parts": "flake-parts",
+        "flake-parts": "flake-parts_2",
         "hercules-ci-agent": "hercules-ci-agent",
         "nixpkgs": "nixpkgs_3"
       },
@@ -173,6 +170,24 @@
       }
     },
     "nixpkgs-lib": {
+      "locked": {
+        "dir": "lib",
+        "lastModified": 1690881714,
+        "narHash": "sha256-h/nXluEqdiQHs1oSgkOOWF+j8gcJMWhwnZ9PFabN6q0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9e1960bc196baf6881340d53dccb203a951745a2",
+        "type": "github"
+      },
+      "original": {
+        "dir": "lib",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib_2": {
       "locked": {
         "dir": "lib",
         "lastModified": 1688049487,
@@ -223,15 +238,15 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1691368598,
-        "narHash": "sha256-ia7li22keBBbj02tEdqjVeLtc7ZlSBuhUk+7XTUFr14=",
-        "owner": "NixOS",
+        "lastModified": 1692734709,
+        "narHash": "sha256-SCFnyHCyYjwEmgUsHDDuU0TsbVMKeU1vwkR+r7uS2Rg=",
+        "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "5a8e9243812ba528000995b294292d3b5e120947",
+        "rev": "b85ed9dcbf187b909ef7964774f8847d554fab3b",
         "type": "github"
       },
       "original": {
-        "owner": "NixOS",
+        "owner": "nixos",
         "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
@@ -239,30 +254,13 @@
     },
     "root": {
       "inputs": {
-        "fenix": "fenix",
+        "flake-parts": "flake-parts",
         "flatland": "flatland",
         "hercules-ci-effects": "hercules-ci-effects",
         "nixpkgs": "nixpkgs_4"
       }
     },
     "rust-analyzer-src": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1691346609,
-        "narHash": "sha256-npJ8zOZ/CQoZu+0kN5NU9iC5JbmbsucyK1DayPmHWPs=",
-        "owner": "rust-lang",
-        "repo": "rust-analyzer",
-        "rev": "baee6b338b0ea076cd7a9f18d47f175dd2ba0e5d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "rust-lang",
-        "ref": "nightly",
-        "repo": "rust-analyzer",
-        "type": "github"
-      }
-    },
-    "rust-analyzer-src_2": {
       "flake": false,
       "locked": {
         "lastModified": 1678695923,