diff --git a/.github/workflows/check-build.yml b/.github/workflows/check-build.yml
index 5824b80..29b3dbf 100644
--- a/.github/workflows/check-build.yml
+++ b/.github/workflows/check-build.yml
@@ -16,7 +16,9 @@ jobs:
           fetch-depth: 0
     - uses: cachix/install-nix-action@v17
       with:
-        name: nix-community
+        extra_nix_config: |
+          extra-substituters = https://nix-community.cachix.org
+          extra-trusted-public-keys = nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
     - name: Retrieve /nix/store archive
       uses: actions/cache@v3
       id: cache-nix-store
diff --git a/.github/workflows/update-dependencies.yml b/.github/workflows/update-dependencies.yml
index f71cb5b..0f4b63e 100644
--- a/.github/workflows/update-dependencies.yml
+++ b/.github/workflows/update-dependencies.yml
@@ -14,7 +14,9 @@ jobs:
           fetch-depth: 0
     - uses: cachix/install-nix-action@v17
       with:
-        name: nix-community
+        extra_nix_config: |
+          extra-substituters = https://nix-community.cachix.org
+          extra-trusted-public-keys = nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
     - name: Create PRs for dependencies
       env:
         GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -45,7 +47,9 @@ jobs:
           fetch-depth: 0
     - uses: cachix/install-nix-action@v17
       with:
-        name: nix-community
+        extra_nix_config: |
+          extra-substituters = https://nix-community.cachix.org
+          extra-trusted-public-keys = nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
     - name: Run test_dep_update
       env:
         GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}