diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 9bb6074607..1025e6a804 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -57,7 +57,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v18
+      - uses: cachix/install-nix-action@v19
+        with:
+          # pin to nix-2.13 to workaround compability issue of 2.14,
+          # see: https://github.com/cachix/install-nix-action/issues/161
+          install_url: https://releases.nixos.org/nix/nix-2.13.3/install
       - uses: cachix/cachix-action@v12
         with:
           name: ethermint
@@ -73,7 +77,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.4
-      - uses: cachix/install-nix-action@v18
+      - uses: cachix/install-nix-action@v19
+        with:
+          # pin to nix-2.13 to workaround compability issue of 2.14,
+          # see: https://github.com/cachix/install-nix-action/issues/161
+          install_url: https://releases.nixos.org/nix/nix-2.13.3/install
       - uses: cachix/cachix-action@v12
         with:
           name: ethermint
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0ea9b5439c..86203733b7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -107,7 +107,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v18
+      - uses: cachix/install-nix-action@v19
+        with:
+          # pin to nix-2.13 to workaround compability issue of 2.14,
+          # see: https://github.com/cachix/install-nix-action/issues/161
+          install_url: https://releases.nixos.org/nix/nix-2.13.3/install
       - uses: cachix/cachix-action@v12
         with:
           name: ethermint
@@ -142,7 +146,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v18
+      - uses: cachix/install-nix-action@v19
+        with:
+          # pin to nix-2.13 to workaround compability issue of 2.14,
+          # see: https://github.com/cachix/install-nix-action/issues/161
+          install_url: https://releases.nixos.org/nix/nix-2.13.3/install
       - uses: cachix/cachix-action@v12
         with:
           name: ethermint