files left in build directory after distclean

[Adam Mercer]

Hi

For one of my projects I'm running into an error where distcheck fails
with the error:

ERROR: files left in build directory after distclean:
./lalapps/src/lalapps/git_version.py
./lalapps/src/lalapps/git_version.sed

Why are these files remaining and how should I ensure they are removed
correctly after distclean?

The appropriate sections of

bin_PROGRAMS = \
        lalapps_version

lalapps_version_SOURCES = \
        version.c \
        lalapps.h \
        LALAppsVCSInfo.h

pkgpython_PYTHON = \
        __init__.py \
        git_version.py

EXTRA_DIST = \
        __init__.py \
        LALAppsVCSInfo.h.in \
        generate_vcs_info.py\
        git_version.py.in

BUILT_SOURCES = \
        LALAppsVCSInfo.h \
        git_version.py \
        git_version.sed

LALAppsVCSInfo.h: LALAppsVCSInfo.h.in git_version.sed
        $(AM_V_GEN)sed -f git_version.sed $(srcdir)/LALAppsVCSInfo.h.in >
LALAppsVCSInfo.h

git_version.py: git_version.py.in git_version.sed
        $(AM_V_GEN)sed -f git_version.sed $(srcdir)/git_version.py.in > 
git_version.py

git_version.sed: $(srcdir)/generate_vcs_info.py
        @$(PYTHON) $(srcdir)/generate_vcs_info.py LALApps $(srcdir) $$PWD

Cheers

Adam