On Sat, Nov 11, 2023 at 07:36:07PM +0530, Shriram Ravindranathan wrote: > dpkg-deb: building package 'libmagicenum-dev' in '../libmagicenum-dev_0.9.3-1_all.deb'. [...] > E: libmagicenum-dev: triplet-dir-and-architecture-mismatch is for arm64 instead of all [usr/lib/aarch64-linux-gnu/] So you are shipping files in /usr/lib inside an arch:all package. You need to change it to arch:any.