…not the literal value `sources`, regardless of what `SRCDIR` might
be.
# Multiple directories can be given so long as files with the same name do not exist in each.
#
# These can be inside of `SRCDIR´ directories if desired.
# Multiple directories can be given so long as files with the same name do not exist in each.
#
# These can be inside of `SRCDIR´ directories if desired.
-INCLUDEDIR := sources/includes
+INCLUDEDIR := $(SRCDIR)/includes
# The directory in which to generate temporary buildfiles.
#
# The directory in which to generate temporary buildfiles.
#