diff --git a/flake.lock b/flake.lock
index 5f9ac55..4ef6807 100644
--- a/flake.lock
+++ b/flake.lock
@@ -22,32 +22,10 @@
         "type": "github"
       }
     },
-    "attic": {
-      "inputs": {
-        "crane": "crane",
-        "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "nixpkgs-stable": "nixpkgs-stable"
-      },
-      "locked": {
-        "lastModified": 1689457600,
-        "narHash": "sha256-1XLn2ZZMaqQx+Ys3eel5hQRkgUn3DeHcVb2JT8WYU0A=",
-        "owner": "zhaofengli",
-        "repo": "attic",
-        "rev": "4902d57f5dae8ec660ee9ee14c45c2192f9fe8b1",
-        "type": "github"
-      },
-      "original": {
-        "owner": "zhaofengli",
-        "repo": "attic",
-        "type": "github"
-      }
-    },
     "colmena": {
       "inputs": {
-        "flake-compat": "flake-compat_2",
-        "flake-utils": "flake-utils_2",
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
         "nixpkgs": [
           "nixpkgs"
         ],
@@ -67,36 +45,6 @@
         "type": "github"
       }
     },
-    "crane": {
-      "inputs": {
-        "flake-compat": [
-          "attic",
-          "flake-compat"
-        ],
-        "flake-utils": [
-          "attic",
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "attic",
-          "nixpkgs"
-        ],
-        "rust-overlay": "rust-overlay"
-      },
-      "locked": {
-        "lastModified": 1677892403,
-        "narHash": "sha256-/Wi0L1spSWLFj+UQxN3j0mPYMoc7ZoAujpUF/juFVII=",
-        "owner": "ipetkov",
-        "repo": "crane",
-        "rev": "105e27adb70a9890986b6d543a67761cbc1964a2",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ipetkov",
-        "repo": "crane",
-        "type": "github"
-      }
-    },
     "darwin": {
       "inputs": {
         "nixpkgs": [
@@ -140,22 +88,6 @@
       }
     },
     "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1673956053,
-        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
-    "flake-compat_2": {
       "flake": false,
       "locked": {
         "lastModified": 1650374568,
@@ -229,21 +161,6 @@
       }
     },
     "flake-utils": {
-      "locked": {
-        "lastModified": 1667395993,
-        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flake-utils_2": {
       "locked": {
         "lastModified": 1659877975,
         "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
@@ -340,32 +257,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1686519857,
-        "narHash": "sha256-VkBhuq67aXXiCoEmicziuDLUPPjeOTLQoj6OeVai5zM=",
+        "lastModified": 1691083802,
+        "narHash": "sha256-bjWTVGskCWR2BdB0Glnj2FyHooNiFThkFBF4oaAMe2s=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6b1b72c0f887a478a5aac355674ff6df0fc44f44",
+        "rev": "096c262bbb73d84b8298d81c7daa9890c6ccd6da",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs-stable": {
-      "locked": {
-        "lastModified": 1685004253,
-        "narHash": "sha256-AbVL1nN/TDicUQ5wXZ8xdLERxz/eJr7+o8lqkIOVuaE=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "3e01645c40b92d29f3ae76344a6d654986a91a91",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-23.05",
+        "ref": "release-23.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -386,22 +287,6 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1691083802,
-        "narHash": "sha256-bjWTVGskCWR2BdB0Glnj2FyHooNiFThkFBF4oaAMe2s=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "096c262bbb73d84b8298d81c7daa9890c6ccd6da",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "release-23.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nur": {
       "locked": {
         "lastModified": 1691109630,
@@ -420,7 +305,6 @@
     "root": {
       "inputs": {
         "agenix": "agenix",
-        "attic": "attic",
         "colmena": "colmena",
         "disko": "disko",
         "flake-parts": "flake-parts",
@@ -428,39 +312,12 @@
         "home-manager": "home-manager_2",
         "nixos-hardware": "nixos-hardware",
         "nixos-hypervisor": "nixos-hypervisor",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "nur": "nur",
         "srvos": "srvos"
       }
     },
-    "rust-overlay": {
-      "inputs": {
-        "flake-utils": [
-          "attic",
-          "crane",
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "attic",
-          "crane",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1675391458,
-        "narHash": "sha256-ukDKZw922BnK5ohL9LhwtaDAdCsJL7L6ScNEyF1lO9w=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "383a4acfd11d778d5c2efcf28376cbd845eeaedf",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
-      }
-    },
     "srvos": {
       "inputs": {
         "nixpkgs": [
diff --git a/hosts/epyc.nix b/hosts/epyc.nix
index 019c5a9..ac0864b 100644
--- a/hosts/epyc.nix
+++ b/hosts/epyc.nix
@@ -31,7 +31,7 @@ in
         "riscv64-linux"
       ];
       supportedFeatures = [ "kvm" "nixos-test" "big-parallel" "benchmark" ] ++ gcc-system-features "znver3";
-      maxJobs = 2;
+      maxJobs = 1;
     }
   ];