126c126,128
< diffcmd = 'diff -ubrs %s ${SOURCES[2].dir} %s > %s' \
---
> # tack 'true' on the end so scons doesn't report diff's
> # non-zero exit code as a build error
> diffcmd = 'diff -ubrs %s ${SOURCES[2].dir} %s > %s; true' \