diff --git a/Propellor/Property/Docker/Shim.hs b/Propellor/Property/Docker/Shim.hs
index 0e0f55e..402f1c1 100644
--- a/Propellor/Property/Docker/Shim.hs
+++ b/Propellor/Property/Docker/Shim.hs
@@ -45,6 +45,7 @@ file propellorbin dest = dest </> propellorbin
 installFile :: FilePath -> FilePath -> IO ()
 installFile top f = do
 	createDirectoryIfMissing True destdir
+	nukeFile dest
 	createLink f dest `catchIO` (const copy)
   where
 	copy = void $ boolSystem "cp" [Param "-a", Param f, Param dest]