meson/test cases/failing/121 pkgconfig not relocatable outside prefix/test.json

{
  "stdout": [
    {
      "line": "test cases/failing/121 pkgconfig not relocatable outside prefix/meson\\.build:17:5: ERROR: Pkgconfig prefix cannot be outside of the prefix when pkgconfig\\.relocatable=true. Pkgconfig prefix is (C:)?/opt/lib/pkgconfig.",
      "match": "re"
    }
  ]
}