Hi Dmitry, thanks for your remarks and help!
> python3-sip-dev is part of sip4, please remove that build-dependency. Done. > If you patched the code to use /usr/bin/sip5, then you need to build-depend > on sip5-tools. Done. > > dh_sip3 -pcalibre-bin > > Please remove it too. dh_sip3 was a helper that added a dependency on Done. > Also please bump build-dependency on pyqt5-dev to 5.15.0+dfsg-1+exp1~, Done. Now it simply does not compile. sip5 seems to be different: SIPing 3 files... sip5 -w -c /tmp/calibre-4.99.4+dfsg+really4.19.0/build/pyqt/pictureflow -b /tmp/calibre-4.99.4+dfsg+really4.19.0/build/pyqt/pictureflow/pictureflow.sip.sbf -I/usr/lib/python3/dist-packages/PyQt5/bindings/ -n sip -t WS_X11 -t Qt_5_14_0 /tmp/calibre-4.99.4+dfsg+really4.19.0/src/calibre/gui2/pictureflow/pictureflow.sip usage: sip5 [-h] [-V] [-a FILE] [--abi-version VERSION] [-B TAG] [-c DIR] [-D] [-e] [-f] [-g] [-I DIR] [-j FILES] [-n NAME] [-o] [-P] [-r] [-s SUFFIX] [-t TAG] [-w] [-x FEATURE] [-X ID:FILE] [-y FILE] [FILE] sip5: error: unrecognized arguments: -b /tmp/calibre-4.99.4+dfsg+really4.19.0/src/calibre/gui2/pictureflow/pictureflow.sip Are you sure that sip(4) and sip5 are actually compatible in any reasonable way? Best Norbert -- PREINING Norbert https://www.preining.info Accelia Inc. + IFMGA ProGuide + TU Wien + JAIST + TeX Live + Debian Dev GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13