Hello, as far as I can tell, the issue can simply be fixed by moving the files OS/unsupported/*-GNU into the folder OS/. At least, the package built successfully for me some days ago, but I did not yet take the time to report the bug.
Greetings, Paul Am 28. November 2019 14:31:40 MEZ schrieb Samuel Thibault <sthiba...@debian.org>: >Hello, > >The exim4 package is currently failing to build from source on >hurd-i386, and that'll pose strong issues, could somebody have a look? > >Samuel