Helpful people on # debian-python pointed to this part of the log: make[1]: Leaving directory '/build/reproducible-path/esys-particle-2.3.5+dfsg2' dh_installchangelogs -a dh_installman -a dh_python3 -a E: dh_python3 dh_python3:198: no package to act on (python3-foo or one with ${python3:Depends} in Depends)
Making the following change: --- a/debian/control +++ b/debian/control @@ -36,6 +36,7 @@ python3, python3-gengeo, ${misc:Depends}, + ${python3:Depends}, ${shlibs:Depends} Suggests: paraview Pre-Depends: ${misc:Pre-Depends} ...caused dh_python3 to do several things, but then the build failed at: dpkg-shlibdeps: error: cannot find library libGeometryPy.so.0 needed by debian/esys-particle/usr/lib/python3/dist-packages/esys/lsm/geometry/GeometryPy.cpython-313-x86_64-linux-gnu.so (ELF format: 'elf64-x86-64' abi: 'ELF:64:l:amd64:0'; RPATH: '/usr/lib/python3.13/site-packages/esys/lsm/geometry')