diff --git a/packages/nx/src/tasks-runner/utils.ts b/packages/nx/src/tasks-runner/utils.ts
index c0ae7d81233dc..b3282b8d17657 100644
--- a/packages/nx/src/tasks-runner/utils.ts
+++ b/packages/nx/src/tasks-runner/utils.ts
@@ -322,19 +322,22 @@ export function getOutputsForTargetAndConfiguration(
   if (targetConfiguration?.outputs) {
     validateOutputs(targetConfiguration.outputs);
 
-    return targetConfiguration.outputs
-      .map((output: string) => {
-        return interpolate(output, {
-          projectRoot: node.data.root,
-          projectName: node.name,
-          project: { ...node.data, name: node.name }, // this is legacy
-          options,
-        });
-      })
-      .filter(
-        (output) =>
-          !!output && !output.match(/{(projectRoot|workspaceRoot|(options.*))}/)
-      );
+    const result = new Set<string>();
+    for (const output of targetConfiguration.outputs) {
+      const interpolatedOutput = interpolate(output, {
+        projectRoot: node.data.root,
+        projectName: node.name,
+        project: { ...node.data, name: node.name }, // this is legacy
+        options,
+      });
+      if (
+        !!interpolatedOutput &&
+        !interpolatedOutput.match(/{(projectRoot|workspaceRoot|(options.*))}/)
+      ) {
+        result.add(interpolatedOutput);
+      }
+    }
+    return Array.from(result);
   }
 
   // Keep backwards compatibility in case `outputs` doesn't exist