diff --git a/flake.lock b/flake.lock
index 10c8c134..46fe6225 100644
--- a/flake.lock
+++ b/flake.lock
@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1640802000,
-        "narHash": "sha256-ZiI94Zv/IgW64fqKrtVaQqfUCkn9STvAjgfFmvtqcQ8=",
+        "lastModified": 1641576265,
+        "narHash": "sha256-G4W39k5hdu2kS13pi/RhyTOySAo7rmrs7yMUZRH0OZI=",
         "owner": "ryantm",
         "repo": "agenix",
-        "rev": "c5558c88b2941bf94886dfdede6926b1ba5f5629",
+        "rev": "08b9c96878b2f9974fc8bde048273265ad632357",
         "type": "github"
       },
       "original": {
@@ -22,11 +22,11 @@
     },
     "devshell": {
       "locked": {
-        "lastModified": 1640301433,
-        "narHash": "sha256-eplae8ZNiEmxbOgwUn9IihaJfEUxoUilkwciRPGskYE=",
+        "lastModified": 1642188268,
+        "narHash": "sha256-DNz4xScpXIn7rSDohdayBpPR9H9OWCMDOgTYegX081k=",
         "owner": "numtide",
         "repo": "devshell",
-        "rev": "f87fb932740abe1c1b46f6edd8a36ade17881666",
+        "rev": "696acc29668b644df1740b69e1601119bf6da83b",
         "type": "github"
       },
       "original": {
@@ -37,11 +37,11 @@
     },
     "emacs-overlay": {
       "locked": {
-        "lastModified": 1641032585,
-        "narHash": "sha256-2AQsgDZ4BdMzFCDtYllxDeVjdilmaQCi6nXnQNPAcpk=",
+        "lastModified": 1642475972,
+        "narHash": "sha256-w4SF0RO2ar1BcRvwnexdFsEZqZ6Rnrss00HvquIvbR8=",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "e5dc491b4294109bbef89bae64be3d2bd7b30549",
+        "rev": "93eedaa62da8ecfc0d700326fdd7419bf0a9bb27",
         "type": "github"
       },
       "original": {
@@ -53,11 +53,11 @@
     "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1627913399,
-        "narHash": "sha256-hY8g6H2KFL8ownSiFeMOjwPC8P0ueXpCVEbxgda3pko=",
+        "lastModified": 1641205782,
+        "narHash": "sha256-4jY7RCWUoZ9cKD8co0/4tFARpWB+57+r1bLLvXNJliY=",
         "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "12c64ca55c1014cdc1b16ed5a804aa8576601ff2",
+        "rev": "b7547d3eed6f32d06102ead8991ec52ab0a4f1a7",
         "type": "github"
       },
       "original": {
@@ -141,6 +141,26 @@
         "type": "github"
       }
     },
+    "guix-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1642423122,
+        "narHash": "sha256-xsvNVlCer6biUn3EYQraVhUnjoMO97f3pfXhlgq/E9c=",
+        "owner": "foo-dogsquared",
+        "repo": "nix-overlay-guix",
+        "rev": "d072d5673a6a6a85f287e9a05caa11483ab7d599",
+        "type": "github"
+      },
+      "original": {
+        "owner": "foo-dogsquared",
+        "repo": "nix-overlay-guix",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -148,11 +168,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1640943848,
-        "narHash": "sha256-AXmbspe5EXTr2WsGdtBhFgKtGvzMmPBgqOanFvQq974=",
+        "lastModified": 1642463060,
+        "narHash": "sha256-6xXRxvMk4OV/k6VwJq54pahToT4FCZzOKfbvG7f6l1E=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "89bdef7994a20b5285454bf42c7d2b53b98d5754",
+        "rev": "8cf13abffc0808b337590a9e382604ab6c2cb3e7",
         "type": "github"
       },
       "original": {
@@ -168,11 +188,11 @@
       },
       "locked": {
         "dir": "contrib",
-        "lastModified": 1640977835,
-        "narHash": "sha256-m2jkhz0087dZeRIA3oL/JmGv9PD06psnFhKPXku8jto=",
+        "lastModified": 1642372778,
+        "narHash": "sha256-c90RlrbH+OYlEwnTEDYpT6vP/a/coHRUSsuU8TG/sPA=",
         "owner": "neovim",
         "repo": "neovim",
-        "rev": "b218d02c442ebacba1fdef0cca9e40315a46aedd",
+        "rev": "0c0469c4f59bf51a6e666a49d69cdb33e93bdf1b",
         "type": "github"
       },
       "original": {
@@ -189,11 +209,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1641024848,
-        "narHash": "sha256-N34WcRPOJKGa6gPNIOBTkfTlJUj9ku1GgTDn27FhOvw=",
+        "lastModified": 1642407344,
+        "narHash": "sha256-89pbQj1uz8HSw/88q/y8JaS9N2/vm2RiyTDrYSAldmo=",
         "owner": "nix-community",
         "repo": "neovim-nightly-overlay",
-        "rev": "c067136c899966364e66dc0471dc8279948fe7d3",
+        "rev": "4b5587d0c1e7a8213bf81f52c0d198e114fa0464",
         "type": "github"
       },
       "original": {
@@ -211,11 +231,11 @@
         "poetry2nix": "poetry2nix"
       },
       "locked": {
-        "lastModified": 1639575084,
-        "narHash": "sha256-m5OFkwadjdyBOUZakhXiFH5HVqwbg2B5j/7GryhzMDU=",
+        "lastModified": 1642257542,
+        "narHash": "sha256-znJjO+22bmYIcMvXTNoxkGrPyCEKhjNpwu/R4gLuKYY=",
         "owner": "thiagokokada",
         "repo": "nix-alien",
-        "rev": "11a6d4aa3096e2982e3204bbf89ca42205617c5c",
+        "rev": "039e009b74b4310986696e28808342741079c7ee",
         "type": "github"
       },
       "original": {
@@ -247,11 +267,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1640871638,
-        "narHash": "sha256-ty6sGnJUQEkCd43At5U3DRQZD7rPARz5VginSW6hZ3k=",
+        "lastModified": 1642104392,
+        "narHash": "sha256-m71b7MgMh9FDv4MnI5sg9MiBVW6DhE1zq+d/KlLWSC8=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "5b091d4fbe3b7b7493c3b46fe0842e4b30ea24b3",
+        "rev": "5aaed40d22f0d9376330b6fa413223435ad6fee5",
         "type": "github"
       },
       "original": {
@@ -263,11 +283,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1640871638,
-        "narHash": "sha256-ty6sGnJUQEkCd43At5U3DRQZD7rPARz5VginSW6hZ3k=",
+        "lastModified": 1642104392,
+        "narHash": "sha256-m71b7MgMh9FDv4MnI5sg9MiBVW6DhE1zq+d/KlLWSC8=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "5b091d4fbe3b7b7493c3b46fe0842e4b30ea24b3",
+        "rev": "5aaed40d22f0d9376330b6fa413223435ad6fee5",
         "type": "github"
       },
       "original": {
@@ -279,11 +299,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1641910925,
-        "narHash": "sha256-XBtRhGGBpuQxGo1aQPZpUmX+pfhAKC65XZbFOVtGILc=",
+        "lastModified": 1642476155,
+        "narHash": "sha256-UBn8E3Hvg1PVV1e8258ka1w6qWEYzI1nU8Lf+v+Zje8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "dea335ea03b6f9cb2bb156bd8801fa0a9d619f16",
+        "rev": "1ac9200a3055d908a69c8fb637c8fffe75f97887",
         "type": "github"
       },
       "original": {
@@ -294,11 +314,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1641016545,
-        "narHash": "sha256-JMNwvnBzG0RjGG3eH27Y5/GlJ9ryeCdGJfqGbqxnmZY=",
+        "lastModified": 1642130244,
+        "narHash": "sha256-/5FhZkZFQCRQIRFosUQW1zmDrsNHVOJIB/+XgRPHiPU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6f05cfdb1e78d36c0337516df674560e4b51c79b",
+        "rev": "bc59ba15b64d0a0ee1d1764f18b4f3480d2c3e5a",
         "type": "github"
       },
       "original": {
@@ -310,11 +330,11 @@
     },
     "nur": {
       "locked": {
-        "lastModified": 1641066357,
-        "narHash": "sha256-KEbe1qYOtY2hrz8U2LBop9qceMXV1+qs4C+KqTPTj5M=",
+        "lastModified": 1642478957,
+        "narHash": "sha256-oWpUDMQpQ5wQuANj28CD+aOAFNaYgtcEM8Y8IcQXEFk=",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "a1e9882968e76de886e35bedf7e4ec905b19347b",
+        "rev": "39405b0f85d42be7b0a282688d59cfe902eab5e8",
         "type": "github"
       },
       "original": {
@@ -329,11 +349,11 @@
         "nixpkgs": "nixpkgs_3"
       },
       "locked": {
-        "lastModified": 1639522248,
-        "narHash": "sha256-LNIVOj0SvJ0XCqaD3EW712yPUQkD5MWjC0vmJCV1oxc=",
+        "lastModified": 1642215333,
+        "narHash": "sha256-hOs6lr62ITT8gAnpj5C248K0PW4IrCuXzgoan+VUgiM=",
         "owner": "nix-community",
         "repo": "poetry2nix",
-        "rev": "c8cadfffd9589b393f010f40aede44434302e845",
+        "rev": "7b5c8e3b838d534e0d4dcaa6bbe6530086ebf407",
         "type": "github"
       },
       "original": {
@@ -348,6 +368,7 @@
         "devshell": "devshell",
         "emacs-overlay": "emacs-overlay",
         "flake-utils": "flake-utils",
+        "guix-overlay": "guix-overlay",
         "home-manager": "home-manager",
         "neovim-nightly-overlay": "neovim-nightly-overlay",
         "nix-alien": "nix-alien",
@@ -365,11 +386,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1641017392,
-        "narHash": "sha256-xpsPFK67HRtlk+39l4I7vko7QKZLBg3AqbXK3MkQoDY=",
+        "lastModified": 1642473686,
+        "narHash": "sha256-VUbbTu6NJFlGaVEsXfwWQeypQPGAobs4UUbyxNZVzA0=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "4000e09a515c0f046a1b8b067f7324111187b115",
+        "rev": "37c9180fb097943e5427de21acba86a47c5f0f71",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index cb174d2e..cbead12c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -32,6 +32,10 @@
     neovim-nightly-overlay.url = "github:nix-community/neovim-nightly-overlay";
     emacs-overlay.url = "github:nix-community/emacs-overlay";
 
+    # Guix in NixOS?!
+    guix-overlay.url = "github:foo-dogsquared/nix-overlay-guix";
+    guix-overlay.inputs.nixpkgs.follows = "nixpkgs";
+
     # The more recommended Rust overlay so I'm going with it.
     rust-overlay.url = "github:oxalica/rust-overlay";
     rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
@@ -104,6 +108,7 @@
         # here.
         nixpkgs.overlays = overlays ++ [
           inputs.nix-alien.overlay
+          inputs.guix-overlay.overlay
         ];
 
         # Please clean your temporary crap.