Hi, On Wed, 29 Mar 2023 20:26:00 +0100 "(" wrote: > Please make sure you use the new-ish LIST/GEXP style for ARGUMENTS; also >, much > of your modified BUILD phase could be replaced by modifying #:MAKE-FLAGS, That didn't work. I suspect it's because Guix is not actually setting the MAKEFLAGS environment variable and so the flags don't get inherited by submakes. Likewise with LAZARUS_LIBPATHS. > Note that I have not tested that this modification actually works, but I'd be > surprised if it didn't. It doesn't work. See attached patch for a halfway version in order to be able to try it out.