diff --git a/.gitea/workflows/build-images.yml b/.gitea/workflows/build-images.yml
index dd9b2583..07cb0fa1 100644
--- a/.gitea/workflows/build-images.yml
+++ b/.gitea/workflows/build-images.yml
@@ -38,7 +38,6 @@ jobs:
     runs-on: linux-amd64
     container:
       image: docker:24-cli
-      options: -v /var/run/docker.sock:/var/run/docker.sock
     steps:
       - name: Checkout
         run: |
@@ -62,7 +61,6 @@ jobs:
     runs-on: linux-amd64
     container:
       image: docker:24-cli
-      options: -v /var/run/docker.sock:/var/run/docker.sock
     steps:
       - name: Checkout
         run: |
@@ -86,7 +84,6 @@ jobs:
     runs-on: linux-amd64
     container:
       image: docker:24-cli
-      options: -v /var/run/docker.sock:/var/run/docker.sock
     steps:
       - name: Checkout
         run: |
diff --git a/tests/unit/ciDockerBuilders.test.ts b/tests/unit/ciDockerBuilders.test.ts
index 8dd17250..bc2d2541 100644
--- a/tests/unit/ciDockerBuilders.test.ts
+++ b/tests/unit/ciDockerBuilders.test.ts
@@ -111,8 +111,10 @@ describe("build-images.yml workflow", () => {
     expect(wf).toContain("workflow_dispatch:");
   });
 
-  it("mounts the host Docker socket for image builds", () => {
-    expect(wf).toContain("-v /var/run/docker.sock:/var/run/docker.sock");
+  it("does not explicitly mount the Docker socket (act_runner mounts it automatically)", () => {
+    // act_runner already mounts /var/run/docker.sock; an explicit options: mount
+    // causes a 'Duplicate mount point' error and must not be present.
+    expect(wf).not.toContain("-v /var/run/docker.sock:/var/run/docker.sock");
   });
 
   it("authenticates to the local Gitea registry before pushing", () => {