diff --git a/.github/workflows/build-with-nix.yml b/.github/workflows/build-with-nix.yml
index 72b746fd..71a9779e 100644
--- a/.github/workflows/build-with-nix.yml
+++ b/.github/workflows/build-with-nix.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{matrix.os}}
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@V28
+    - uses: cachix/install-nix-action@v30
     - uses: cachix/cachix-action@v15
       with:
         name: tket
@@ -30,7 +30,7 @@ jobs:
     runs-on: cuda
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@V28
+    - uses: cachix/install-nix-action@v30
     - uses: cachix/cachix-action@v15
       with:
         name: tket