There are several independent discussions about it. As one mentioned fontconfig I looked at M17. Well, indeed
https://build.opensuse.org/package/binaries/M17N/fontconfig?repository=openS...:
::import::i586::fontconfig-32bit-2.12.0-153.1.x86_64.rpm ::import::i586::fontconfig-devel-32bit-2.12.0-153.1.x86_64.rpm _buildenv fontconfig-2.12.1-155.2.src.rpm fontconfig-2.12.1-155.2.x86_64.rpm fontconfig-devel-2.12.1-155.2.x86_64.rpm
https://build.opensuse.org/package/binaries/M17N/fontconfig?repository=openS...
_buildenv fontconfig-2.12.1-155.3.src.rpm fontconfig-2.12.1-155.3.x86_64.rpm fontconfig-devel-2.12.1-155.3.x86_64.rpm
This is the same package having the same baslibs.conf. What's the difference? Note that in Leap 42.2 itself those packages *are* built.