Content of RPM nx-libs-devel-3.5.0.33-4.fc26.x86_64.rpm :
/usr/include/nx/X11/X10.h
/usr/include/nx/X11/extensions
/usr/include/nx/X11/extensions/XRes.h
/usr/include/nx/X11/extensions/XTest.h
/usr/include/nx/X11/extensions/Xcomposite.h
/usr/include/nx/X11/extensions/Xdamage.h
/usr/include/nx/X11/extensions/Xevie.h
/usr/include/nx/X11/extensions/Xinerama.h
/usr/include/nx/X11/extensions/Xrandr.h
/usr/include/nx/X11/extensions/dmxext.h
/usr/include/nx/X11/extensions/lbxbuf.h
/usr/include/nx/X11/extensions/lbxbufstr.h
/usr/include/nx/X11/extensions/lbxdeltastr.h
/usr/include/nx/X11/extensions/lbximage.h
/usr/include/nx/X11/extensions/lbxopts.h
/usr/include/nx/X11/extensions/lbxzlib.h
/usr/include/nx/X11/extensions/panoramiXext.h
/usr/include/nx/X11/extensions/record.h
/usr/include/nx/X11/extensions/xf86dga1.h
/usr/include/nx/X11/extensions/xf86vmode.h
/usr/include/nx/X11/fonts
/usr/include/nx/X11/fonts/bdfint.h
/usr/include/nx/X11/fonts/bitmap.h
/usr/include/nx/X11/fonts/bufio.h
/usr/include/nx/X11/fonts/fntfil.h
/usr/include/nx/X11/fonts/fntfilio.h
/usr/include/nx/X11/fonts/fntfilst.h
/usr/include/nx/X11/fonts/fontencc.h
/usr/include/nx/X11/fonts/fontmisc.h
/usr/include/nx/X11/fonts/fontmod.h
/usr/include/nx/X11/fonts/fontshow.h
/usr/include/nx/X11/fonts/fontutil.h
/usr/include/nx/X11/fonts/fontxlfd.h
/usr/include/nx/X11/fonts/pcf.h
/usr/include/nx/X11/misc.h
/usr/include/nx/X11/os.h
/usr/lib64/nx/libNX_Xcomposite.so
/usr/lib64/nx/libNX_Xdamage.so
/usr/lib64/nx/libNX_Xinerama.so
/usr/lib64/nx/libNX_Xrandr.so
/usr/lib64/nx/libNX_Xtst.so