diff --git a/flake.lock b/flake.lock
index 19ce477..7bb5df8 100644
--- a/flake.lock
+++ b/flake.lock
@@ -56,25 +56,6 @@
         "type": "github"
       }
     },
-    "codex": {
-      "inputs": {
-        "nixpkgs": "nixpkgs",
-        "rust-overlay": "rust-overlay"
-      },
-      "locked": {
-        "lastModified": 1774808374,
-        "narHash": "sha256-sdZo+xCeWfIV+sbW8UaYopyXnUkP5IrqMLiPGS3jgP8=",
-        "owner": "openai",
-        "repo": "codex",
-        "rev": "38e648ca67802d5f2fb23f9b3bd3f200cdb067fa",
-        "type": "github"
-      },
-      "original": {
-        "owner": "openai",
-        "repo": "codex",
-        "type": "github"
-      }
-    },
     "disko": {
       "inputs": {
         "nixpkgs": [
@@ -230,22 +211,6 @@
       }
     },
     "nixpkgs": {
-      "locked": {
-        "lastModified": 1769461804,
-        "narHash": "sha256-msG8SU5WsBUfVVa/9RPLaymvi5bI8edTavbIq3vRlhI=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "bfc1b8a4574108ceef22f02bafcf6611380c100d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_2": {
       "locked": {
         "lastModified": 1774701658,
         "narHash": "sha256-CIS/4AMUSwUyC8X5g+5JsMRvIUL3YUfewe8K4VrbsSQ=",
@@ -261,7 +226,7 @@
         "type": "github"
       }
     },
-    "nixpkgs_3": {
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1767640445,
         "narHash": "sha256-UWYqmD7JFBEDBHWYcqE6s6c77pWdcU/i+bwD6XxMb8A=",
@@ -279,7 +244,7 @@
     },
     "openspec": {
       "inputs": {
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": "nixpkgs_2"
       },
       "locked": {
         "lastModified": 1772182342,
@@ -299,37 +264,15 @@
       "inputs": {
         "agentcomputer-cli": "agentcomputer-cli",
         "claudeCode": "claudeCode",
-        "codex": "codex",
         "disko": "disko",
         "googleworkspace-cli": "googleworkspace-cli",
         "home-manager": "home-manager",
         "nix-darwin": "nix-darwin",
         "nix-homebrew": "nix-homebrew",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs",
         "openspec": "openspec"
       }
     },
-    "rust-overlay": {
-      "inputs": {
-        "nixpkgs": [
-          "codex",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1769828398,
-        "narHash": "sha256-zmnvRUm15QrlKH0V1BZoiT3U+Q+tr+P5Osi8qgtL9fY=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "a1d32c90c8a4ea43e9586b7e5894c179d5747425",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
-      }
-    },
     "systems": {
       "locked": {
         "lastModified": 1681028828,