Fix local archive resolution

- wouldn't have worked with absolute paths in snapshots

Author: loewenstein-sap

src/Stack/Snapshot.hs

@@ -282,9 +282,9 @@ loadResolver (ResolverCustom url loc) = do
             }
           resolveLocalArchive pl = pl
           resolveLocalFilePath path =
-            if not $ isURI path && FilePath.isRelative path
-              then FilePath.dropFileName fp FilePath.</> FilePath.normalise path
-              else path
+            if isURI path || FilePath.isAbsolute path
+              then path
+              else FilePath.dropFileName fp FilePath.</> FilePath.normalise path
 
       WithJSONWarnings (sd0, mparentResolver, mcompiler) warnings <-
         liftIO (decodeFileEither fp) >>= either