diff --git a/dist/index.js b/dist/index.js
index 9d81b88..4510952 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -234,7 +234,11 @@ function run() {
             }
             for (const cmd of inputs.cmds) {
                 yield core.group(cmd, () => __awaiter(this, void 0, void 0, function* () {
-                    yield exec.exec(`${daggerBin} ${cmd} --log-format plain`);
+                    yield exec.exec(`${daggerBin} ${cmd}`, undefined, {
+                        env: Object.assign({}, process.env, {
+                            DAGGER_LOG_FORMAT: 'plain'
+                        })
+                    });
                 }));
             }
         }
diff --git a/src/main.ts b/src/main.ts
index f36d1b0..e8510a8 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -34,7 +34,13 @@ async function run(): Promise<void> {
 
     for (const cmd of inputs.cmds) {
       await core.group(cmd, async () => {
-        await exec.exec(`${daggerBin} ${cmd} --log-format plain`);
+        await exec.exec(`${daggerBin} ${cmd}`, undefined, {
+          env: Object.assign({}, process.env, {
+            DAGGER_LOG_FORMAT: 'plain'
+          }) as {
+            [key: string]: string;
+          }
+        });
       });
     }
   } catch (error) {