more RawFilePath conversion

nukeFile replaced with removeWhenExistsWith removeLink, which allows
using RawFilePath. Utility.Directory cannot use RawFilePath since setup
does not depend on posix.

This commit was sponsored by Graham Spencer on Patreon.

Build/Standalone.hs

@@ -95,7 +95,7 @@ installGitLibs topdir = do
 						unlessM (doesFileExist linktarget') $ do
 							createDirectoryIfMissing True (takeDirectory linktarget')
 							L.readFile f >>= L.writeFile linktarget'
-						nukeFile destf
+						removeWhenExistsWith removeLink destf
 						rellinktarget <- relPathDirToFile (takeDirectory destf) linktarget'
 						createSymbolicLink rellinktarget destf
 			else cp f destf
@@ -125,7 +125,7 @@ installGitLibs topdir = do
 
 cp :: FilePath -> FilePath -> IO ()
 cp src dest = do
-	nukeFile dest
+	removeWhenExistsWith removeLink dest
 	unlessM (boolSystem "cp" [Param "-a", File src, File dest]) $
 		error "cp failed"