diff --git a/.travis.yml b/.travis.yml
index 6d8d8b7fcc..282254b5d7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,8 +30,8 @@ before_script:
   - export PATH=$(pwd)/bin:$PATH
 script:
   - nim c koch
-  - ./koch boot -d:nimCoroutines
-  - ./koch boot -d:release -d:nimCoroutines
+  - ./koch boot
+  - ./koch boot -d:release
   - ./koch nimble
   - nim e tests/test_nimscript.nims
   - nimble install zip -y
diff --git a/appveyor.yml b/appveyor.yml
index 9199755d93..f27429681b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -43,8 +43,8 @@ install:
 
 build_script:
   - bin\nim c koch
-  - koch boot -d:nimCoroutines
-  - koch boot -d:release -d:nimCoroutines
+  - koch boot
+  - koch boot -d:release
   - koch nimble
   - nim e tests/test_nimscript.nims
   - nimble install zip -y