+##
+# error codes
+E_GENERAL=1
+E_PKGFILE=2 # invalid Pkgfile
+E_DIR_PERM=3 # (source/build) directory missing or missing read/write permission
+E_DOWNLOAD=4 # error during download
+E_UNPACK=5 # error during unpacking of source file(s)
+E_MD5=6 # md5sum verification failed
+E_FOOTPRINT=7 # footprint check failure
+E_BUILD=8 # error while running 'build()'
+E_INSTALL=9 # error while installing the package via 'pkgadd'
+