this is the main problem here :
/home/dubian/pure-data/externals/build/src/../../zexy/src/zexy.h:47:23:
error: zexyconf.h: No such file or directory
Eric, go and find the header file , by 'find -name 'zexy.h' or 'slocate
'zexy.h'' ..well try to stat
/home/dubian/pure-data/externals/build/src/../../zexy/src/zexy.h first,
may be it is a broken symlink ..in fact it might be some of '-I' flags
set incorrectly or something .. anyway - once you found the file - copy
it where it is missing form, you know (might just do this: 'cp find /home/dubian/pure-data/externals/ -name zexy.h
/home/dubian/pure-data/externals/build/src/../../zexy/src/zexy.h') ..have a look , may be the problem is with this path ..
good luck.