diff --git a/README.md b/README.md
index c18fc73..129f11c 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,10 @@ need to use a separate `stack-cache-action` step any more.
   like, but teams often use `v{N}` and bump it to `v{N+1}` when/if they need to
   explicitly bust caches. The default is empty.
 
+- `cache-save-always`: save artifacts to the cache even if the build fails.
+  This may speed up builds in subsequent runs at the expense of slightly-longer
+  builds when a full cache-hit occurs. (Since `@v4.2.0`)
+
 ## Outputs
 
 `compiler` (e.g. `ghc-9.2.5`) and `compiler-version` (e.g. `9.2.5`) are set from
diff --git a/action.yml b/action.yml
index 76dbccf..eafe7a5 100644
--- a/action.yml
+++ b/action.yml
@@ -28,6 +28,9 @@ inputs:
   cache-prefix:
     required: true
     default: ""
+  cache-save-always:
+    description: "Save the dependencies and build cache even if a build fails"
+    default: false
 outputs:
   compiler:
     description: "compiler.actual value from stack query"
@@ -207,7 +210,9 @@ runs:
           ${{ inputs.cache-prefix }}${{ runner.os }}-stack-deps-${{ steps.stack-query.outputs.compiler }}-
 
     - name: Dependencies
-      if: steps.restore-deps.outputs.cache-hit != 'true'
+      if: |
+        (success() && steps.restore-deps.outputs.cache-hit != 'true') ||
+        (!cancelled() && inputs.cache-save-always == 'true')
       shell: bash
       working-directory: ${{ inputs.working-directory }}
       run: |
@@ -220,7 +225,9 @@ runs:
           ${{ inputs.stack-arguments }}
 
     - name: Save dependencies cache
-      if: steps.restore-deps.outputs.cache-hit != 'true'
+      if: |
+        (success() && steps.restore-deps.outputs.cache-hit != 'true') ||
+        (!cancelled() && inputs.cache-save-always == 'true')
       uses: actions/cache/save@v3
       with:
         path: |
@@ -240,7 +247,9 @@ runs:
           ${{ inputs.cache-prefix }}${{ runner.os }}-stack-build-${{ steps.setup.outputs.snapshot-hash }}-
 
     - name: Build
-      if: steps.restore-build.outputs.cache-hit != 'true'
+      if: |
+        (success() && steps.restore-build.outputs.cache-hit != 'true') ||
+        (!cancelled() && inputs.cache-save-always == 'true')
       shell: bash
       working-directory: ${{ inputs.working-directory }}
       run: |
@@ -251,7 +260,9 @@ runs:
           ${{ inputs.stack-arguments }}
 
     - name: Save build cache
-      if: steps.restore-build.outputs.cache-hit != 'true'
+      if: |
+        (success() && steps.restore-build.outputs.cache-hit != 'true') ||
+        (!cancelled() && inputs.cache-save-always == 'true')
       uses: actions/cache/save@v3
       with:
         path: ${{ steps.setup.outputs.stack-works }}