This patch defines the include paths for shiboken2, pyside2 and includes the locations of the pyside2-tools binaries. There's now another error: --8<---------------cut here---------------start------------->8--- [ 69%] Building CXX object src/Gui/CMakeFiles/FreeCADGui.dir/WidgetFactory.cpp.o cd /tmp/guix-build-freecad-0.18.4.drv-0/build/src/Gui && /gnu/store/rn75fm7adgx3pw5j8pg3bczfqq1y17lk-gcc-7.5.0/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_FILESYSTEM_DYN_LINK -DBOOST_PROGRAM_OPTIONS_DYN_LINK -DBOOST_REGEX_DYN_LINK -DBOOST_SYSTEM_DYN_LINK -DBOOST_THREAD_DYN_LINK -DBUILD_ADDONMGR -DCMAKE_BUILD_TYPE=\"RelWithDebInfo\" -DFreeCADGui_EXPORTS -DHAVE_CONFIG_H -DHAVE_PYSIDE2 -DHAVE_SHIBOKEN2 -DHAVE_TBB -DOCC_CONVERT_SIGNALS -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_PRINTSUPPORT_LIB -DQT_SVG_LIB -DQT_UITOOLS_LIB -DQT_WIDGETS_LIB -DQT_X11EXTRAS_LIB -DQT_XML_LIB -DSPNAV_FOUND -D_OCC64 -I/tmp/guix-build-freecad-0.18.4.drv-0/build -I/tmp/guix-build-freecad-0.18.4.drv-0/build/src -I/tmp/guix-build-freecad-0.18.4.drv-0/freecad-0.18.4-checkout/src -I/tmp/guix-build-freecad-0.18.4.drv-0/freecad-0.18.4-checkout/src/Gui -I/tmp/guix-build-freecad-0.18.4.drv-0/freecad-0.18.4-checkout/src/Gui/Quarter -I/tmp/guix-build-freecad-0.18.4.drv-0/build/src/Gui -I/tmp/guix-build-freecad-0.18.4.drv-0/freecad-0.18.4-checkout/src/Gui/.. -I/tmp/guix-build-freecad-0.18.4.drv-0/build/src/Gui/.. -I/tmp/guix-build-freecad-0.18.4.drv-0/build/src/Gui/Language -I/tmp/guix-build-freecad-0.18.4.drv-0/build/src/Gui/propertyeditor -I/tmp/guix-build-freecad-0.18.4.drv-0/build/src/Gui/TaskView -I/tmp/guix-build-freecad-0.18.4.drv-0/build/src/Gui/Quarter -I/tmp/guix-build-freecad-0.18.4.drv-0/build/src/Gui/DAGView -I/gnu/store/azmwdwavv9r08zvzp200y8c6hkm0dsrr-eigen-3.3.7/include/eigen3 -I/gnu/store/q9rm8h9imazsq2c4qiv2yjpvlvliywqb-python-3.8.2/include/python3.8 -I/gnu/store/hcpcfn6b25ja5hdlvcw3flnapzhi7k3i-python-pyside-2-5.14.2.3/include/QtCore -I/gnu/store/hcpcfn6b25ja5hdlvcw3flnapzhi7k3i-python-pyside-2-5.14.2.3/include/QtGui -I/gnu/store/hcpcfn6b25ja5hdlvcw3flnapzhi7k3i-python-pyside-2-5.14.2.3/include/QtWidgets -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/include/qt5 -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/include/qt5/QtCore -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/lib/qt5/mkspecs/linux-g++ -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/include/qt5/QtWidgets -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/include/qt5/QtGui -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/include/qt5/QtOpenGL -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/include/qt5/QtPrintSupport -isystem /gnu/store/kvn3ip3aziw15yn2jv6ka7s1x1v2y7p4-qtsvg-5.14.2/include/qt5 -isystem /gnu/store/kvn3ip3aziw15yn2jv6ka7s1x1v2y7p4-qtsvg-5.14.2/include/qt5/QtSvg -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/include/qt5/QtNetwork -isystem /gnu/store/yqrjvsn778ydl6pc1p463alljhczxw8i-qttools-5.14.2/include/qt5 -isystem /gnu/store/yqrjvsn778ydl6pc1p463alljhczxw8i-qttools-5.14.2/include/qt5/QtUiTools -isystem /gnu/store/wajjrym3vyidi21zjcs6r8ad9xgxfj3k-qtx11extras-5.14.2/include/qt5 -isystem /gnu/store/wajjrym3vyidi21zjcs6r8ad9xgxfj3k-qtx11extras-5.14.2/include/qt5/QtX11Extras -isystem /gnu/store/kg1bc1ghars6qnw6zlc4igml2nqfbiy7-qtbase-5.14.2/include/qt5/QtXml -Wall -Wextra -Wno-write-strings -std=c++11 -D_OCC64 -O2 -g -DNDEBUG -fPIC -pthread -fPIC -o CMakeFiles/FreeCADGui.dir/WidgetFactory.cpp.o -c /tmp/guix-build-freecad-0.18.4.drv-0/freecad-0.18.4-checkout/src/Gui/WidgetFactory.cpp /tmp/guix-build-freecad-0.18.4.drv-0/freecad-0.18.4-checkout/src/Gui/WidgetFactory.cpp:79:11: fatal error: basewrapper.h: No such file or directory # include ^~~~~~~~~~~~~~~ compilation terminated. make[2]: *** [src/Gui/CMakeFiles/FreeCADGui.dir/build.make:4659: src/Gui/CMakeFiles/FreeCADGui.dir/WidgetFactory.cpp.o] Error 1 make -f src/Mod/Inspection/App/CMakeFiles/Inspection.dir/build.make src/Mod/Inspection/App/CMakeFiles/Inspection.dir/depend make[2]: *** Waiting for unfinished jobs.... make[2]: Entering directory '/tmp/guix-build-freecad-0.18.4.drv-0/build' --8<---------------cut here---------------end--------------->8--- This is what needs to be looked into next. Malte