try abspath

Author: IanButterworth

src/Operations.jl

@@ -227,7 +227,7 @@ end
 # about extensions
 function fixups_from_projectfile!(env::EnvCache)
     for pkg in values(env.manifest)
-        _source_path = source_path(env.manifest_file, pkg)
+        _source_path = abspath(source_path(env.manifest_file, pkg))
         project_file = try
             Base.locate_project_file(_source_path)
         catch