diff --git a/shake-ats.cabal b/shake-ats.cabal
--- a/shake-ats.cabal
+++ b/shake-ats.cabal
@@ -1,5 +1,5 @@
 name:                shake-ats
-version:             1.0.0.1
+version:             1.0.0.2
 synopsis:            Utilities for building ATS projects with shake
 description:         Various helper functions for building [ATS](http://www.ats-lang.org/) with the [shake](http://shakebuild.com/) library
 homepage:            https://github.com/vmchale/shake-ats#readme
diff --git a/src/Development/Shake/ATS.hs b/src/Development/Shake/ATS.hs
--- a/src/Development/Shake/ATS.hs
+++ b/src/Development/Shake/ATS.hs
@@ -86,11 +86,11 @@
         let subdir = takeDirectory cf ++ "/"
             endsBuild = (== "build") . last . splitPath
         dir <- filter endsBuild <$> liftIO (getSubdirs $ subdir ++ "dist-newstyle/build")
-        let obj = head dir ++ "/" ++ (takeFileName obf)
+        let obj = head dir ++ "/" ++ takeFileName obf
         liftIO $ copyFile obj out
 
         let hdr = dropExtension obj ++ "_stub.h"
-        liftIO $ copyFile hdr (takeDirectory out ++ "/" ++ hdr)
+        liftIO $ copyFile hdr (takeDirectory out ++ "/" ++ takeFileName hdr)
 
 -- cabal deps
 ghcExport :: String -> Rules ()