>>> host-python-networkx 2.4 Extracting gzip -d -c /home/naourr/work/instance-3/dl/python-networkx/networkx-2.4.tar.gz | /home/naourr/work/instance-3/output-1/host/bin/tar --strip-components=1 -C /home/naourr/work/instance-3/output-1/build/host-python-networkx-2.4 -xf - >>> host-python-networkx 2.4 Patching >>> host-python-networkx 2.4 Configuring >>> host-python-networkx 2.4 Building (cd /home/naourr/work/instance-3/output-1/build/host-python-networkx-2.4//; PATH="/home/naourr/work/instance-3/output-1/host/bin:/home/naourr/work/instance-3/output-1/host/sbin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/naourr/bin:/home/naourr/git/git-wrappers:/home/naourr/.local/bin:/home/naourr/bin" PYTHONNOUSERSITE=1 PATH="/home/naourr/work/instance-3/output-1/host/bin:/home/naourr/work/instance-3/output-1/host/sbin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/naourr/bin:/home/naourr/git/git-wrappers:/home/naourr/.local/bin:/home/naourr/bin" PKG_CONFIG="/home/naourr/work/instance-3/output-1/host/bin/pkg-config" PKG_CONFIG_SYSROOT_DIR="/" PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG_LIBDIR="/home/naourr/work/instance-3/output-1/host/lib/pkgconfig:/home/naourr/work/instance-3/output-1/host/share/pkgconfig" AR="/usr/bin/ar" AS="/usr/bin/as" LD="/usr/bin/ld" NM="/usr/bin/nm" CC="/usr/bin/gcc" GCC="/usr/bin/gcc" CXX="/usr/bin/g++" CPP="/usr/bin/cpp" OBJCOPY="/usr/bin/objcopy" RANLIB="/usr/bin/ranlib" CPPFLAGS="-I/home/naourr/work/instance-3/output-1/host/include" CFLAGS="-O2 -I/home/naourr/work/instance-3/output-1/host/include" CXXFLAGS="-O2 -I/home/naourr/work/instance-3/output-1/host/include" LDFLAGS="-L/home/naourr/work/instance-3/output-1/host/lib -Wl,-rpath,/home/naourr/work/instance-3/output-1/host/lib" INTLTOOL_PERL=/usr/bin/perl /home/naourr/work/instance-3/output-1/host/bin/python setup.py build ) NetworkX 2.3+ requires Python 3.5 or later (2.7 detected). For Python 2.7, please install version 2.2 using: $ pip install 'networkx==2.2' make: *** [package/pkg-generic.mk:250: /home/naourr/work/instance-3/output-1/build/host-python-networkx-2.4/.stamp_built] Error 1 make: Leaving directory '/home/naourr/work/instance-3/buildroot'