diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index cab17e8..21976df 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -114,3 +114,7 @@ jobs:
         darwin-rebuild build \
           --flake /tmp/test-nix-darwin-submodules?submodules=1#simple \
           --override-input darwin .
+        # Should also succeed
+        darwin-rebuild build \
+          --flake git+file:///tmp/test-nix-darwin-submodules?submodules=1#simple \
+          --override-input darwin .
diff --git a/pkgs/nix-tools/darwin-rebuild.sh b/pkgs/nix-tools/darwin-rebuild.sh
index 25d704f..ca0b266 100644
--- a/pkgs/nix-tools/darwin-rebuild.sh
+++ b/pkgs/nix-tools/darwin-rebuild.sh
@@ -123,9 +123,9 @@ flakeFlags=(--extra-experimental-features 'nix-command flakes')
 if [ -n "$flake" ]; then
     # Offical regex from https://www.rfc-editor.org/rfc/rfc3986#appendix-B
     if [[ "${flake}" =~ ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))? ]]; then
-       scheme=${BASH_REMATCH[2]}
-       authority=${BASH_REMATCH[4]}
-       path=${BASH_REMATCH[5]}
+       scheme=${BASH_REMATCH[1]} # eg. http:
+       authority=${BASH_REMATCH[3]} # eg. //www.ics.uci.edu
+       path=${BASH_REMATCH[5]} # eg. /pub/ietf/uri/
        queryWithQuestion=${BASH_REMATCH[6]}
        fragment=${BASH_REMATCH[9]}