diff --git a/flake.lock b/flake.lock
index e3a2628..be40ade 100644
--- a/flake.lock
+++ b/flake.lock
@@ -110,6 +110,27 @@
         "type": "path"
       }
     },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "openconnect-sso",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1703863825,
+        "narHash": "sha256-rXwqjtwiGKJheXB43ybM8NwWB8rO2dSRrEqes0S7F5Y=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "5163432afc817cf8bd1f031418d1869e4c9d5547",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
     "nix-index-database": {
       "inputs": {
         "nixpkgs": [
@@ -148,24 +169,66 @@
     "openconnect-sso": {
       "inputs": {
         "flake-utils": "flake-utils",
+        "nix-github-actions": "nix-github-actions",
         "nixpkgs": [
           "nixpkgs"
-        ]
+        ],
+        "poetry2nix": "poetry2nix",
+        "systems": "systems_2",
+        "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1692692901,
-        "narHash": "sha256-JFVvTw11KFnrd/A5z3QCh30ac9MZG+ojDY3udAFpmCE=",
-        "owner": "vlaci",
+        "lastModified": 1701455376,
+        "narHash": "sha256-FMLrMdi6JY7ZfqV5XnNj64jnDcGKznKZLn7O6OMO3u0=",
+        "owner": "ThinkChaos",
         "repo": "openconnect-sso",
-        "rev": "94128073ef49acb3bad84a2ae19fdef926ab7bdf",
+        "rev": "20c0015c4264c72cc19ac272de0dc534309bd21b",
         "type": "github"
       },
       "original": {
-        "owner": "vlaci",
+        "owner": "ThinkChaos",
+        "ref": "fix/nix-flake",
         "repo": "openconnect-sso",
         "type": "github"
       }
     },
+    "poetry2nix": {
+      "inputs": {
+        "flake-utils": [
+          "openconnect-sso",
+          "flake-utils"
+        ],
+        "nix-github-actions": [
+          "openconnect-sso",
+          "nix-github-actions"
+        ],
+        "nixpkgs": [
+          "openconnect-sso",
+          "nixpkgs"
+        ],
+        "systems": [
+          "openconnect-sso",
+          "systems"
+        ],
+        "treefmt-nix": [
+          "openconnect-sso",
+          "treefmt-nix"
+        ]
+      },
+      "locked": {
+        "lastModified": 1703546497,
+        "narHash": "sha256-CN/7HaEmHz+akXKejkRVhsxAm6HPGOmYBWMtgMkuROA=",
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "rev": "528d500ea826383cc126a9be1e633fc92b19ce5d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "agenix": "agenix",
@@ -190,6 +253,42 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "openconnect-sso",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1704233915,
+        "narHash": "sha256-GYDC4HjyVizxnyKRbkrh1GugGp8PP3+fJuh40RPCN7k=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "e434da615ef74187ba003b529cc72f425f5d941e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 43a8f52..4fa1c86 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,7 +16,7 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
     openconnect-sso = {
-      url = "github:vlaci/openconnect-sso";
+      url = "github:ThinkChaos/openconnect-sso/fix/nix-flake";
       inputs.nixpkgs.follows = "nixpkgs";
     };
     cyrus-sasl-xoauth2 = {
@@ -41,7 +41,6 @@
         inherit system;
         config.allowUnfree = true;
         overlays = [
-          inputs.openconnect-sso.overlay
           (final: prev: {
             emacs-vterm =
               ((pkgs.emacsPackagesFor pkgs.emacs29-pgtk).emacsWithPackages
diff --git a/modules/software.nix b/modules/software.nix
index b53bc0f..3237d5e 100644
--- a/modules/software.nix
+++ b/modules/software.nix
@@ -91,7 +91,7 @@ in {
     # Overlays
     cachix
     # Networking
-    openconnect-sso
+    inputs.openconnect-sso.packages.${config.nixpkgs.localSystem.system}.default
     # Budgeting
     beancount
     beancount-language-server