diff --git a/.github/workflows/test-flakes.yml b/.github/workflows/test-flakes.yml
index bb920e6..51f5c54 100644
--- a/.github/workflows/test-flakes.yml
+++ b/.github/workflows/test-flakes.yml
@@ -18,11 +18,6 @@ jobs:
           # Nix Flakes doesn't work on shallow clones
           fetch-depth: 0
     - uses: cachix/install-nix-action@v15
-      with:
-        install_url: https://github.com/numtide/nix-unstable-installer/releases/download/nix-2.4pre20210823_af94b54/install
-        extra_nix_config: |
-          experimental-features = nix-command flakes
-          system-features = nixos-test benchmark big-parallel kvm
     - name: List flake structure
       run: nix flake show
     - name: Build
diff --git a/flake.lock b/flake.lock
index cd313f5..ea8caf8 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1631561581,
-        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
         "type": "github"
       },
       "original": {
@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1633770157,
-        "narHash": "sha256-XARYW5Txxdu2DDFPEJNh2Mds3tp3/UgZ2YvNZZc4c+o=",
+        "lastModified": 1637048323,
+        "narHash": "sha256-h2m2LuUEbV5pvNjXoWbk2rAaBAQAsf3cvJXS8DGi+Bo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "dd713915de0133cd8132e2117e8f13970f16ebd2",
+        "rev": "6b68d74f036def3d48a23969edfd0fa47f34af3e",
         "type": "github"
       },
       "original": {