This is the spot where the error occurs: cd /var/tmp/paludis/media-gfx-darktable-2.2.0_rc2/work/darktable-2.2.0_rc2_build/src/external/rawspeed && /usr/bin/x86_64-pc-linux-gnu-g++ -DGDK_DISABLE_DEPRECATED -DGDK_VERSION_MIN_REQUIRED =GDK_VERSION_3_14 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_MIN_REQUIRED -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_40 -DGTK_DISABLE_DEPRECATED -DGTK_DISABLE_SINGLE_INCLUDES -DHAVE_BUILTIN_CPU_ SUPPORTS -DHAVE_CONFIG_H -DHAVE_HTTP_SERVER -DHAVE_LENSFUN -DHAVE_LIBSECRET -DHAVE_OPENCL -D_RELEASE -D_XOPEN_SOURCE=700 -D__GDK_KEYSYMS_COMPAT_H__ -I"/var/tmp/paludis/media-gfx-darktable-2.2 .0_rc2/work/darktable-2.2.0~rc2/src" -I"/var/tmp/paludis/media-gfx-darktable-2.2.0_rc2/work/darktable-2.2.0~rc2/src/external" -isystem /usr/include/glib-2.0 -isystem /usr/lib64/glib-2.0/inclu de -isystem /usr/include/gtk-3.0 -isystem /usr/include/at-spi2-atk/2.0 -isystem /usr/include/at-spi-2.0 -isystem /usr/include/dbus-1.0 -isystem /usr/lib64/dbus-1.0/include -isystem /usr/inclu de/gio-unix-2.0 -isystem /usr/include/cairo -isystem /usr/include/pango-1.0 -isystem /usr/include/harfbuzz -isystem /usr/include/atk-1.0 -isystem /usr/include/pixman-1 -isystem /usr/include/f reetype2 -isystem /usr/include/libdrm -isystem /usr/include/gdk-pixbuf-2.0 -isystem /usr/include/libpng16 -isystem /usr/include/libxml2 -isystem /usr/include/libsoup-2.4 -isystem /usr/include /lensfun -isystem /usr/include/librsvg-2.0 -isystem /usr/include/json-glib-1.0 -isystem /usr/include/libsecret-1 -I/var/tmp/paludis/media-gfx-darktable-2.2.0_rc2/work/darktable-2.2.0_rc2_buil d/src -DNDEBUG -march=native -O2 -pipe -msse3 -Wall -fno-strict-aliasing -Wformat -Wformat-security -Wshadow -Wtype-limits -Wvla -Wno-error=varargs -Wframe-larger-than=32768 -Wstack-usage=3 2768 -Wlarger-than=524288 -std=c++11 -fopenmp -pthread -Wno-error=shadow -Wframe-larger-than=16384 -Wstack-usage=16384 -Wlarger-than=16384 -fPIC -o CMakeFiles/rawspeed.dir/RawSpeed/BitPumpM SB16.cpp.o -c "/var/tmp/paludis/media-gfx-darktable-2.2.0_rc2/work/darktable-2.2.0~rc2/src/external/rawspeed/RawSpeed/BitPumpMSB16.cpp" usage: jsonschema [-h] [-i INSTANCES] [-F ERROR_FORMAT] [-V VALIDATOR] schema jsonschema: error: argument -i/--instance: invalid _json_file value: '/var/tmp/paludis/media-gfx-darktable-2.2.0_rc2/work/darktable-2.2.0~rc2/data/noiseprofiles.json' make[2]: *** [data/CMakeFiles/validate_noiseprofiles_json.dir/build.make:59: data/CMakeFiles/validate_noiseprofiles_json] Error 2 make[2]: Leaving directory '/dev/shm/media-gfx-darktable-2.2.0_rc2/work/darktable-2.2.0_rc2_build' make[1]: *** [CMakeFiles/Makefile2:6869: data/CMakeFiles/validate_noiseprofiles_json.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs....
Same as https://bugs.gentoo.org/show_bug.cgi?id=601888
https://github.com/darktable-org/darktable/commit/450a5da31a1ed0d3004e813bc5ea986c307b9e9d The problem is: https://github.com/Julian/jsonschema/issues/299#issuecomment-254045209 https://github.com/docker-library/python/pull/5#issuecomment-50556812
*** This bug has been marked as a duplicate of bug 601888 ***