diff --git a/src/toolchain/index.ts b/src/toolchain/index.ts
index 9098a0e..5899fb4 100644
--- a/src/toolchain/index.ts
+++ b/src/toolchain/index.ts
@@ -109,7 +109,7 @@ export function reduceIR(llvmTC: LLVMToolchain, IR: string) {
 
             proc.stdout.pipe(compileScalar.stdin);
 
-            return Promise.all([proc, compileScalar].map(promisifySpawn));
+            await Promise.all([proc, compileScalar].map(promisifySpawn));
         }
     };
 }