HTTPD_DOCUMENT_ROOT_PATH="$TRASH_DIRECTORY"
 
+test_have_prereq MINGW && export GREP_OPTIONS=-U
+
 run_backend() {
        echo "$2" |
        QUERY_STRING="${1#*\?}" \
-       GIT_PROJECT_ROOT="$HTTPD_DOCUMENT_ROOT_PATH" \
-       PATH_INFO="${1%%\?*}" \
+       PATH_TRANSLATED="$HTTPD_DOCUMENT_ROOT_PATH/${1%%\?*}" \
        git http-backend >act.out 2>act.err
 }