diff --git a/lib/main.js b/lib/main.js
index d11366e..e78df1e 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -96,22 +96,21 @@ function run() {
                 }
             }
             yield exec.exec(`${emsdk} activate ${emArgs.version}`);
-            yield exec.exec(`${emsdk} construct_env`, [], { listeners: {
-                    stdline(message) {
-                        const pathRegex = new RegExp(/PATH \+= (\S+)/);
-                        const pathResult = pathRegex.exec(message);
-                        if (pathResult) {
-                            core.addPath(pathResult[1]);
-                            return;
-                        }
-                        const envRegex = new RegExp(/(\S+) = (\S+)/);
-                        const envResult = envRegex.exec(message);
-                        if (envResult) {
-                            core.exportVariable(envResult[1], envResult[2]);
-                            return;
-                        }
-                    }
-                } });
+            const envListener = (message) => {
+                const pathRegex = new RegExp(/PATH \+= (\S+)/);
+                const pathResult = pathRegex.exec(message);
+                if (pathResult) {
+                    core.addPath(pathResult[1]);
+                    return;
+                }
+                const envRegex = new RegExp(/(\S+) = (\S+)/);
+                const envResult = envRegex.exec(message);
+                if (envResult) {
+                    core.exportVariable(envResult[1], envResult[2]);
+                    return;
+                }
+            };
+            yield exec.exec(`${emsdk} construct_env`, [], { listeners: { stdline: envListener, errline: envListener } });
             if (emArgs.actionsCacheFolder && !foundInCache) {
                 fs.mkdirSync(`${process.env.GITHUB_WORKSPACE}/${emArgs.actionsCacheFolder}`, { recursive: true });
                 yield exec.exec(`cp -r ${emsdkFolder}/emsdk-master ${process.env.GITHUB_WORKSPACE}/${emArgs.actionsCacheFolder}`);
diff --git a/src/main.ts b/src/main.ts
index acd4a36..5ea4e09 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -74,25 +74,24 @@ async function run() {
     }
 
     await exec.exec(`${emsdk} activate ${emArgs.version}`);
-    await exec.exec(`${emsdk} construct_env`, [], {listeners: {
-      stdline(message) {
-        const pathRegex = new RegExp(/PATH \+= (\S+)/)
-        const pathResult = pathRegex.exec(message);
+    const envListener = (message) => {
+      const pathRegex = new RegExp(/PATH \+= (\S+)/)
+      const pathResult = pathRegex.exec(message);
 
-        if (pathResult) {
-          core.addPath(pathResult[1]);
-          return;
-        }
-        
-        const envRegex = new RegExp(/(\S+) = (\S+)/);
-        const envResult = envRegex.exec(message);
+      if (pathResult) {
+        core.addPath(pathResult[1]);
+        return;
+      }
+
+      const envRegex = new RegExp(/(\S+) = (\S+)/);
+      const envResult = envRegex.exec(message);
 
-        if (envResult) {
-          core.exportVariable(envResult[1], envResult[2]);
-          return;
-        }
+      if (envResult) {
+        core.exportVariable(envResult[1], envResult[2]);
+        return;
       }
-    }})
+    };
+    await exec.exec(`${emsdk} construct_env`, [], {listeners: {stdline: envListener, errline: envListener}})
 
     if (emArgs.actionsCacheFolder && !foundInCache) {
       fs.mkdirSync(`${process.env.GITHUB_WORKSPACE}/${emArgs.actionsCacheFolder}`, { recursive: true });