I can reproduce the installation failure with slib 3a4-4 and drscheme 1:352-6, although the error is now:
... Setting up mzscheme (352-6) ... Cataloging SLIB routines... reference to undefined identifier: slib:features dpkg: error processing mzscheme (--configure): ... -- installation fails with slib https://launchpad.net/bugs/38936 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
