Mine

$ sh -x ./tools/post-install-check.sh 
++ which glxgears
+ GLXGEARS=/usr/bin/glxgears
+ '[' 0 = 1 ']'
+ which yukon
++ yukon printenv
++ grep LD_LIBRARY_PATH
++ grep yukon:
+ RET=LD_LIBRARY_PATH=/home/plouj/.yukon/local:/usr/local/lib/yukon:
+ '[' -z LD_LIBRARY_PATH=/home/plouj/.yukon/local:/usr/local/lib/yukon: ']'
++ yukon ldd /usr/bin/glxgears
++ grep yukon/libGL.so.native
+ RET='	libGL.so.native => /usr/local/lib/yukon/libGL.so.native (0x0000003ae8600000)'
+ '[' -z '	libGL.so.native => /usr/local/lib/yukon/libGL.so.native (0x0000003ae8600000)' ']'
++ echo libGL.so.native '=>' /usr/local/lib/yukon/libGL.so.native '(0x0000003ae8600000)'
++ sed -e 's#.*\s/\(.*\)/libGL.so.native.*#/\1#'
+ YPATH=/usr/local/lib/yukon
++ grep -E 'libseom.so.?'
++ grep 'not found'
++ yukon ldd /usr/local/lib/yukon/yukon-core-lib
+ RET='	libseom.so.0 => not found'
+ '[' -n '	libseom.so.0 => not found' ']'
+ echo 'libseom.so.? not found.'
libseom.so.? not found.
+ echo ' - Make sure this library is installed and the linker can find it'
 - Make sure this library is installed and the linker can find it
+ exit 1