diff --git a/.github/workflows/binaries.yaml b/.github/workflows/binaries.yaml
index 454576a6f03..1ef8d37e4b3 100644
--- a/.github/workflows/binaries.yaml
+++ b/.github/workflows/binaries.yaml
@@ -23,7 +23,7 @@ jobs:
         fetch-depth: 0
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -67,7 +67,7 @@ jobs:
         fetch-depth: 0
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/cardano-node.yaml b/.github/workflows/cardano-node.yaml
index a269352bd71..fbefa76f6a1 100644
--- a/.github/workflows/cardano-node.yaml
+++ b/.github/workflows/cardano-node.yaml
@@ -18,7 +18,7 @@ jobs:
         ref: 8.7.2
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -50,7 +50,7 @@ jobs:
         ref: 170817f5ba3f7838ffd9bd181bc30504906a6506
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/ci-nix.yaml b/.github/workflows/ci-nix.yaml
index 4d2d3c46adb..7af5844b046 100644
--- a/.github/workflows/ci-nix.yaml
+++ b/.github/workflows/ci-nix.yaml
@@ -38,7 +38,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -112,7 +112,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -159,7 +159,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -238,7 +238,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -263,7 +263,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -300,7 +300,7 @@ jobs:
         fetch-depth: 0
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/docker.yaml b/.github/workflows/docker.yaml
index 0f54bc2c03b..98c959b365b 100644
--- a/.github/workflows/docker.yaml
+++ b/.github/workflows/docker.yaml
@@ -36,7 +36,7 @@ jobs:
         password: ${{ secrets.GITHUB_TOKEN }}
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/formatting.yaml b/.github/workflows/formatting.yaml
index 9fe8aeec4f3..6110620cf73 100644
--- a/.github/workflows/formatting.yaml
+++ b/.github/workflows/formatting.yaml
@@ -12,7 +12,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/network-test.yaml b/.github/workflows/network-test.yaml
index 27a2b1557fc..e058674adce 100644
--- a/.github/workflows/network-test.yaml
+++ b/.github/workflows/network-test.yaml
@@ -38,7 +38,7 @@ jobs:
         submodules: true
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/publish-docs.yaml b/.github/workflows/publish-docs.yaml
index d7953247e5d..04b6c06bd6a 100644
--- a/.github/workflows/publish-docs.yaml
+++ b/.github/workflows/publish-docs.yaml
@@ -25,7 +25,7 @@ jobs:
         fetch-depth: 0
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/smoke-test.yaml b/.github/workflows/smoke-test.yaml
index dc0ec38bd4e..e9a6ef14108 100644
--- a/.github/workflows/smoke-test.yaml
+++ b/.github/workflows/smoke-test.yaml
@@ -35,7 +35,7 @@ jobs:
         submodules: true
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/update-hydra-spec.yaml b/.github/workflows/update-hydra-spec.yaml
index 11ff22429dd..4f50a515466 100644
--- a/.github/workflows/update-hydra-spec.yaml
+++ b/.github/workflows/update-hydra-spec.yaml
@@ -11,7 +11,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v13
+        uses: cachix/install-nix-action@V28
       - name: Update flake.lock
         uses: DeterminateSystems/update-flake-lock@v24
         with: