On Sun, 2022-10-16 at 23:42 +0200, Christoph Grüninger wrote: > Makefile | make -f - am--depfiles > > make: *** fopen (temporary file): No such file or directory. Stop. > > Any idea what I am missing? I double-checked hat the used make has > version 4.3.91. You'll need to triple-check then. It's not physically possible for GNU make version 4.3.91 to generate that error message. Somehow your build system is still running some other version of make; it's probably a good idea to figure that out and see what version it actually is. Maybe add a line to your recipe that runs make with --version to see what's happening. The code in GNU make 4.3.91 says: if (outfile == 0) OSS (fatal, NILF, _("fopen: temporary file %s: %s"), newnm, strerror (errno)); My suspicion is that you're running the old, broken version of GNU make that Apple ships with its Xcode environment.