diff --git a/flake.lock b/flake.lock
index 0ea6555..135188b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,26 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1652733177,
-        "narHash": "sha256-mRpdBbVk8tbYVgEE6oTBbFT1vkVdF7EzaP7bMQ26wWA=",
+        "lastModified": 1653893745,
+        "narHash": "sha256-0jntwV3Z8//YwuOjzhV2sgJJPt+HY6KhU7VZUL0fKZQ=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "04b4d989fda8f14e6fcd1fee631eab9c54d15b97",
+        "rev": "1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "locked": {
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
         "type": "github"
       },
       "original": {
@@ -23,11 +38,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1655153792,
-        "narHash": "sha256-cDBDbvqh/5qlhC8goE+/A+AeBpPlD/fOIAvhLsqCslA=",
+        "lastModified": 1656116654,
+        "narHash": "sha256-UhxssUfSQ832uGlmsp/lXoN8gCww1qz4rVAjOEi9QrQ=",
         "owner": "astro",
         "repo": "microvm.nix",
-        "rev": "85adc1701842cd9bc494dc0a78871f92a1af416e",
+        "rev": "5b778a33c9a123ff02c3fcd6323605387a245db3",
         "type": "github"
       },
       "original": {
@@ -38,11 +53,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1655278232,
-        "narHash": "sha256-H6s7tnHYiDKFCcLADS4sl1sUq0dDJuRQXCieguk/6SA=",
+        "lastModified": 1656265786,
+        "narHash": "sha256-A9RkoGrxzsmMm0vily18p92Rasb+MbdDMaSnzmywXKw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "8b538fcb329a7bc3d153962f17c509ee49166973",
+        "rev": "cd90e773eae83ba7733d2377b6cdf84d45558780",
         "type": "github"
       },
       "original": {
@@ -54,11 +69,11 @@
     },
     "nixpkgs-21_11": {
       "locked": {
-        "lastModified": 1654346688,
-        "narHash": "sha256-Y7QtZkfdxTvACCvWmDjpN6qOf4OKkZATufHcJP2VMKM=",
+        "lastModified": 1656198488,
+        "narHash": "sha256-xe81o3Kin6a0jXA3mTxcR+jeA1jLKw3TCar5LUo/B5c=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "2de556c4cd46a59e8ce2f85ee4dd400983213d45",
+        "rev": "46af3303651699dc58cfc251d9b18c0f59d857da",
         "type": "github"
       },
       "original": {
@@ -70,11 +85,11 @@
     },
     "nixpkgs-22_05": {
       "locked": {
-        "lastModified": 1654373220,
-        "narHash": "sha256-3vKFnZz2oYHo4YcelaNOhO4XQ2jiIEXrp1s4w+e773c=",
+        "lastModified": 1656199498,
+        "narHash": "sha256-/BCpM7j7y1G4het6Z3idlnv9A87/s0O1glVmH7fnWvk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d6cb04299ce8964290ae7fdcb87aa50da0500b5c",
+        "rev": "72a1f167077060a1a7b6e0104863245d0483fa7f",
         "type": "github"
       },
       "original": {
@@ -86,11 +101,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1655306633,
-        "narHash": "sha256-nv4FfWWV/dEelByjXJtJkoDPOHIsKfLq50RN3Hqq5Yk=",
+        "lastModified": 1656239181,
+        "narHash": "sha256-wW1xRFBn376yGloXZ4QzBE4hjipMawpV18Lshd9QSPw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b1957596ff1c7aa8c55c4512b7ad1c9672502e8e",
+        "rev": "f2537a505d45c31fe5d9c27ea9829b6f4c4e6ac5",
         "type": "github"
       },
       "original": {
@@ -100,14 +115,50 @@
         "type": "github"
       }
     },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1637453606,
+        "narHash": "sha256-Gy6cwUswft9xqsjWxFYEnx/63/qzaFUwatcbV5GF/GQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8afc4e543663ca0a6a4f496262cd05233737e732",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "microvm": "microvm",
         "nixpkgs": "nixpkgs",
         "nixpkgs-unstable": "nixpkgs-unstable",
+        "rust-overlay": "rust-overlay",
         "sops-nix": "sops-nix"
       }
     },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1656308123,
+        "narHash": "sha256-RTjxLCBEIxWvo4TLqEho+QxtY7ImRAMWJisIdWZ8tWY=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "c5d343b92c5c72c436e402484497c4f4e763b9ae",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
     "sops-nix": {
       "inputs": {
         "nixpkgs": [
@@ -117,11 +168,11 @@
         "nixpkgs-22_05": "nixpkgs-22_05"
       },
       "locked": {
-        "lastModified": 1654401128,
-        "narHash": "sha256-uCdQ2fzIPGakHw2TkvOncUvCl7Fo7z/vagpDWYooO7s=",
+        "lastModified": 1656215886,
+        "narHash": "sha256-67fkBb4GUbuMZTHs08mNycg0hBzboy+5boMD76wLpj4=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "f075361ecbde21535b38e41dfaa28a28f160855c",
+        "rev": "aff5d8542c9eb566a000302b22fcc10715bc2feb",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index ca2f64f..e18a807 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,7 +34,7 @@
           ./modules/binary-caches.nix
           ./modules/science.nix
           ./modules/mail.nix
-           ({ pkgs, ... }: {
+          ({ pkgs, ... }: {
             nixpkgs.overlays = [ rust-overlay.overlay ];
             environment.systemPackages = with pkgs; [
               rust-bin.stable.latest.default