diff --git a/README.md b/README.md
index aa77807..907f7d8 100644
--- a/README.md
+++ b/README.md
@@ -114,4 +114,6 @@ jobs:
     runs-on: docker
     steps:
       uses: https://forgejo.skynet.ie/Skynet/actions/docker_nix@v7
+      with:
+        nix_version: nixos-unstable
 ```
diff --git a/docker_nix/action.yml b/docker_nix/action.yml
index 1961629..72f0374 100644
--- a/docker_nix/action.yml
+++ b/docker_nix/action.yml
@@ -11,7 +11,7 @@ runs:
         apt install sudo
     - uses: https://github.com/cachix/install-nix-action@v29
       with:
-        nix_path: nixpkgs=channel:nixos-unstable
+        nix_path: nixpkgs=channel:${{ inputs.nix_version }}
         extra_nix_config: |
           trusted-public-keys = skynet-cache:zMFLzcRZPhUpjXUy8SF8Cf7KGAZwo98SKrzeXvdWABo= hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
           substituters = https://nix-cache.skynet.ie/skynet-cache https://hydra.iohk.io https://cache.nixos.org/