diff --git a/src/libfetchers/git.cc b/src/libfetchers/git.cc
index f8433bc28..91dd332a2 100644
--- a/src/libfetchers/git.cc
+++ b/src/libfetchers/git.cc
@@ -28,9 +28,7 @@ static std::string readHead(const Path & path)
 
 static bool isNotDotGitDirectory(const Path & path)
 {
-    static const std::regex gitDirRegex("^(?:.*/)?\\.git$");
-
-    return not std::regex_match(path, gitDirRegex);
+    return baseNameOf(path) != ".git";
 }
 
 struct GitInputScheme : InputScheme