diff --git a/.github/workflows/deltachat-rpc-server.yml b/.github/workflows/deltachat-rpc-server.yml
index 5754589cfe..c9a0bea9a9 100644
--- a/.github/workflows/deltachat-rpc-server.yml
+++ b/.github/workflows/deltachat-rpc-server.yml
@@ -34,7 +34,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
 
       - name: Build deltachat-rpc-server binaries
         run: nix build .#deltachat-rpc-server-${{ matrix.arch }}-linux
@@ -58,7 +58,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
 
       - name: Build deltachat-rpc-server wheels
         run: nix build .#deltachat-rpc-server-${{ matrix.arch }}-linux-wheel
@@ -82,7 +82,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
 
       - name: Build deltachat-rpc-server binaries
         run: nix build .#deltachat-rpc-server-${{ matrix.arch }}
@@ -106,7 +106,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
 
       - name: Build deltachat-rpc-server wheels
         run: nix build .#deltachat-rpc-server-${{ matrix.arch }}-wheel
@@ -157,7 +157,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
 
       - name: Build deltachat-rpc-server binaries
         run: nix build .#deltachat-rpc-server-${{ matrix.arch }}-android
@@ -181,7 +181,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
 
       - name: Build deltachat-rpc-server wheels
         run: nix build .#deltachat-rpc-server-${{ matrix.arch }}-android-wheel
@@ -208,7 +208,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
 
       - name: Download Linux aarch64 binary
         uses: actions/download-artifact@v7
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 8a4ac05f5a..380c1b68e6 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -25,7 +25,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
       - run: nix fmt flake.nix -- --check
 
   build:
@@ -83,7 +83,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
       - run: nix build .#${{ matrix.installable }}
 
   build-macos:
@@ -104,5 +104,5 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
       - run: nix build .#${{ matrix.installable }}
diff --git a/.github/workflows/repl.yml b/.github/workflows/repl.yml
index 5c97b3e874..1f5463cb92 100644
--- a/.github/workflows/repl.yml
+++ b/.github/workflows/repl.yml
@@ -18,7 +18,7 @@ jobs:
         with:
           show-progress: false
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
       - name: Build
         run: nix build .#deltachat-repl-win64
       - name: Upload binary
diff --git a/.github/workflows/upload-docs.yml b/.github/workflows/upload-docs.yml
index 78a8c59218..144272a89c 100644
--- a/.github/workflows/upload-docs.yml
+++ b/.github/workflows/upload-docs.yml
@@ -41,7 +41,7 @@ jobs:
           show-progress: false
           persist-credentials: false
           fetch-depth: 0 # Fetch history to calculate VCS version number.
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
       - name: Build Python documentation
         run: nix build .#python-docs
       - name: Upload to py.delta.chat
@@ -63,7 +63,7 @@ jobs:
           show-progress: false
           persist-credentials: false
           fetch-depth: 0 # Fetch history to calculate VCS version number.
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31.11.0
       - name: Build C documentation
         run: nix build .#docs
       - name: Upload to c.delta.chat