diff --git a/flake.lock b/flake.lock
index ebbc823fde..f3b7acf8f6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -319,28 +319,6 @@
         "type": "github"
       }
     },
-    "hydra": {
-      "inputs": {
-        "nix": "nix",
-        "nixpkgs": [
-          "hydra",
-          "nix",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1671755331,
-        "narHash": "sha256-hXsgJj0Cy0ZiCiYdW2OdBz5WmFyOMKuw4zyxKpgUKm4=",
-        "owner": "NixOS",
-        "repo": "hydra",
-        "rev": "f48f00ee6d5727ae3e488cbf9ce157460853fea8",
-        "type": "github"
-      },
-      "original": {
-        "id": "hydra",
-        "type": "indirect"
-      }
-    },
     "iserv-proxy": {
       "flake": false,
       "locked": {
@@ -358,59 +336,6 @@
         "type": "github"
       }
     },
-    "lowdown-src": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1633514407,
-        "narHash": "sha256-Dw32tiMjdK9t3ETl5fzGrutQTzh2rufgZV4A/BbxuD4=",
-        "owner": "kristapsdz",
-        "repo": "lowdown",
-        "rev": "d2c2b44ff6c27b936ec27358a2653caaef8f73b8",
-        "type": "github"
-      },
-      "original": {
-        "owner": "kristapsdz",
-        "repo": "lowdown",
-        "type": "github"
-      }
-    },
-    "nix": {
-      "inputs": {
-        "lowdown-src": "lowdown-src",
-        "nixpkgs": "nixpkgs",
-        "nixpkgs-regression": "nixpkgs-regression"
-      },
-      "locked": {
-        "lastModified": 1661606874,
-        "narHash": "sha256-9+rpYzI+SmxJn+EbYxjGv68Ucp22bdFUSy/4LkHkkDQ=",
-        "owner": "NixOS",
-        "repo": "nix",
-        "rev": "11e45768b34fdafdcf019ddbd337afa16127ff0f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "2.11.0",
-        "repo": "nix",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1657693803,
-        "narHash": "sha256-G++2CJ9u0E7NNTAi9n5G8TdDmGJXcIjkJ3NF8cetQB8=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "365e1b3a859281cf11b94f87231adeabbdd878a2",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-22.05-small",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nixpkgs-2003": {
       "locked": {
         "lastModified": 1620055814,
@@ -539,22 +464,6 @@
         "type": "github"
       }
     },
-    "nixpkgs-regression": {
-      "locked": {
-        "lastModified": 1643052045,
-        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
-        "type": "github"
-      }
-    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1729980323,
@@ -609,7 +518,6 @@
         "hls-2.8": "hls-2.8",
         "hls-2.9": "hls-2.9",
         "hpc-coveralls": "hpc-coveralls",
-        "hydra": "hydra",
         "iserv-proxy": "iserv-proxy",
         "nixpkgs": [
           "nixpkgs-unstable"
diff --git a/flake.nix b/flake.nix
index 4d7a252e95..727a7c8494 100644
--- a/flake.nix
+++ b/flake.nix
@@ -23,7 +23,6 @@
     "hls-2.7" = { url = "github:haskell/haskell-language-server/2.7.0.0"; flake = false; };
     "hls-2.8" = { url = "github:haskell/haskell-language-server/2.8.0.0"; flake = false; };
     "hls-2.9" = { url = "github:haskell/haskell-language-server/2.9.0.1"; flake = false; };
-    hydra.url = "hydra";
     hackage = {
       url = "github:input-output-hk/hackage.nix";
       flake = false;