This was mentioned on the yi-devel list http://groups.google.com/group/yi-devel/browse_frm/thread/392c3cd612490b1a/c304d54ffc000e4a?lnk=gst&q=HSgtk.o%3A+unknown+symbol&# but didn't cause much excitement as it's not clear whose problem it is, so I'll ask here as well: I recently downloaded yi-0.3 and tried to build it, but get Loading package base ... linking ... done. Loading package array-0.1.0.0 ... linking ... done. Loading package bytestring-0.9.0.1 ... linking ... done. Loading package regex-base-0.72.0.1 ... linking ... done. Loading package regex-posix-0.72.0.2 ... linking ... done. Loading package regex-compat-0.71.0.1 ... linking ... done. Loading package fingertree-0.0 ... linking ... done. Loading package mtl-1.1.0.0 ... linking ... done. Loading package glib-0.9.12.1 ... linking ... done. Loading package cairo-0.9.12.1 ... linking ... done. yi: /usr/lib/ghc/6.8.2/gtk2hs/HSgtk.o: unknown symbol `containerszm0zi1zi0zi1_DataziSequence_length_info' Loading package gtk-0.9.12.1 ... linking ... yi: exception :: GhcException for any attempted invocation of yi. I don't know whether this problem is specific to yi, to gtk2hs or to the fedora 8 rpm of gtk2hs or something else (ghc 6.8.2). I tried to rpm --rebuild the gtk2hs source rpm, but the build failed, complaining of missing documentation files (the spec file can't be right, or I'd have seen an unsatisfied build-dependency message instead). What's the next step? -- Jón Fairbairn Jon.Fairbairn@cl.cam.ac.uk