diff --git a/ats-setup.cabal b/ats-setup.cabal
--- a/ats-setup.cabal
+++ b/ats-setup.cabal
@@ -1,5 +1,5 @@
 name:                ats-setup
-version:             0.4.0.0
+version:             0.4.0.2
 synopsis:            ATS scripts for Cabal builds
 description:         This package contains various scripts that go in a package's @Setup.hs@ to make building libraries with ATS dependencies easier.
 license:             BSD3
diff --git a/src/Distribution/ATS.hs b/src/Distribution/ATS.hs
--- a/src/Distribution/ATS.hs
+++ b/src/Distribution/ATS.hs
@@ -110,10 +110,10 @@
 
 fetchDependencies :: ConfigFlags -> [ATSDependency] -> IO ()
 fetchDependencies cfs =
-    bool nothing act cond
+    bool act nothing cond
     where act = (>> stopGlobalPool) . parallel_ . fmap fetchDependency
-          nothing = pure $ pure ()
-          cond = (mkFlagName "with-atsdeps", True) `elem` configConfigurationsFlags cfs
+          nothing = pure mempty
+          cond = (mkFlagName "with-atsdeps", False) `elem` configConfigurationsFlags cfs
 
 fetchDependency :: ATSDependency -> IO ()
 fetchDependency (ATSDependency libNameATS dirName url) = do