While migrating giftbot to the Stretch job grid I ran into this problem:
%package require mysqltcl couldn't load file "/data/project/shared/tcl/lib/mysqltcl-3.052/libmysqltcl3.052.so": libmysqlclient.so.18: cannot open shared object file: No such file or directory
%package require tls
couldn't load file "/mnt/nfs/labstore-secondary-tools-project/.shared/tcl/lib/tls1.6.4/libtls1.6.4.so": libssl.so.1.0.0: cannot open shared object file: No such file or directory
Those aren't the exact versions that the packages provide but I will recompile my libraries and then everything matches (I already tested this on a stretch VPS instance).