diff --git a/flake.lock b/flake.lock
index e3ea8f61..d8b2e4a9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -42,15 +42,16 @@
         "nixpkgs-regression": "nixpkgs-regression"
       },
       "locked": {
-        "lastModified": 1706195509,
-        "narHash": "sha256-1kwfk7H/MWZAcTKHnnWXo/+KlQeOTIRtOIzc4FX3QnE=",
+        "lastModified": 1706637536,
+        "narHash": "sha256-fjx+nCOzuSxGWfhwWWc8hCsLFZAjZLDDUcbBtldRqbk=",
         "owner": "NixOS",
         "repo": "nix",
-        "rev": "8df68a213fc52a57b02a57005b0e06cc8de40ce3",
+        "rev": "8f42912c80c0a03f62f6a3d28a3af05a9762565d",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
+        "ref": "2.20-maintenance",
         "repo": "nix",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 4dc7d25e..306ed292 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "A Nix-based continuous build system";
 
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05-small";
-  inputs.nix.url = "github:NixOS/nix";
+  inputs.nix.url = "github:NixOS/nix/2.20-maintenance";
   inputs.nix.inputs.nixpkgs.follows = "nixpkgs";
 
   # TODO get rid of this once https://github.com/NixOS/nix/pull/9546 is