diff --git a/.changeset/swift-chicken-sip.md b/.changeset/swift-chicken-sip.md
new file mode 100644
index 000000000..b92963cc0
--- /dev/null
+++ b/.changeset/swift-chicken-sip.md
@@ -0,0 +1,5 @@
+---
+"reusable-dependabump": patch
+---
+
+Support nix based port-bump-command
diff --git a/.github/workflows/reusable-dependabump.yml b/.github/workflows/reusable-dependabump.yml
index 785c0658a..058937423 100644
--- a/.github/workflows/reusable-dependabump.yml
+++ b/.github/workflows/reusable-dependabump.yml
@@ -67,6 +67,12 @@ jobs:
             dependabot && gomods tidy
         continue-on-error: true
 
+      - name: Install Nix
+        if: ${{ steps.bump.outcome == 'success' && contains(inputs.post-bump-command, 'nix') }}
+        uses: cachix/install-nix-action@02a151ada4993995686f9ed4f1be7cfbb229e56f # v31
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
       - name: Post-bump Command
         id: post-bump
         if: ${{ steps.bump.outcome == 'success' && inputs.post-bump-command != '' }}
diff --git a/workflows/reusable-dependabump/reusable-dependabump.yml b/workflows/reusable-dependabump/reusable-dependabump.yml
index af5eab437..503a32f43 100644
--- a/workflows/reusable-dependabump/reusable-dependabump.yml
+++ b/workflows/reusable-dependabump/reusable-dependabump.yml
@@ -63,6 +63,12 @@ jobs:
             dependabot && gomods tidy
         continue-on-error: true
 
+      - name: Install Nix
+        if: ${{ steps.bump.outcome == 'success' && contains(inputs.post-bump-command, 'nix') }}
+        uses: cachix/install-nix-action@02a151ada4993995686f9ed4f1be7cfbb229e56f # v31
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
       - name: Post-bump Command
         id: post-bump
         if: ${{ steps.bump.outcome == 'success' && inputs.post-bump-command != '' }}