diff --git a/flake.lock b/flake.lock
index b7922587b..70d2b3b87 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,16 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1637636156,
-        "narHash": "sha256-E2ym4Vcpqu9JYoQDXJZR48gVD+LPPbaCoYveIk7Xu3Y=",
+        "lastModified": 1638279546,
+        "narHash": "sha256-1KCwN7twjp1dBdp0jPgVdYFztDkCR8+roo0B34J9oBY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b026e1cf87a108dd06fe521f224fdc72fd0b013d",
+        "rev": "96b4157790fc96e70d6e6c115e3f34bba7be490f",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "release-21.11",
+        "ref": "nixos-21.11",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 0e89187fc..de5c2871e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   description = "The third-generation ARTIQ compiler";
 
-  inputs.nixpkgs.url = github:NixOS/nixpkgs/release-21.11;
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-21.11;
 
   outputs = { self, nixpkgs }:
     let