i should also add that the output of "./pyboms" list shows that gr-fosphor IS installed, output below:
Loading recipes ...
Printing recipe status list:
{'pseudo': ['all'], 'common': ['airprobe', 'airspy', 'bladeRF', 'fecapi', 'glfw3', 'gnss-sdr', 'gnuradio', 'gqrx', 'gqrx-digital', 'gr-air-modes', 'gr-ais', 'gr-as', 'gr-baz', 'gr-benchmark', 'gr-bluetooth', 'gr-compat', 'gr-drm', 'gr-dsd', 'gr-dvbs2', 'gr-dvbt', 'gr-dvbt2', 'gr-elster', 'gr-ettus', 'gr-eventstream', 'gr-extras', 'gr-fcdproplus', 'gr-fosphor', 'gr-gsm', 'gr-ham', 'gr-ieee-80211', 'gr-ieee-802154', 'gr-iqbal', 'gr-ldpc', 'gr-lte', 'gr-mediatools', 'gr-mtb', 'gr-multimon', 'gr-op25', 'gr-osmosdr', 'gr-packetradio', 'gr-pcap', 'gr-pocsag', 'gr-pyqt', 'gr-radar', 'gr-rds', 'gr-smartnet', 'gr-smithchart', 'gr-specest', 'gr-tagutils', 'gr-theano', 'gr-tutorial', 'gr-zmqblocks', 'hackrf', 'kal', 'libbtbb', 'libosmo-dsp', 'libosmocore', 'mbelib', 'niusprio', 'openlte', 'osmo-sdr', 'osmo-tetra', 'pmc', 'pocsag-mrt', 'pysstv', 'rtl-sdr', 'simple_radio_astronomy', 'theron', 'uhd', 'wireshark'], 'baseline': ['alsa', 'apr', 'aprutil', 'armadillo', 'atk', 'autoconf', 'automake', 'bison', 'blas', 'boost', 'cairo', 'cheetah', 'cmake', 'cppunit', 'curl', 'db48', 'expat', 'faac', 'faad', 'ffi', 'fftw', 'flex', 'fontconfig', 'freetype', 'gcc', 'gdk-pixbuf', 'gflags', 'gfortran', 'git', 'glib', 'glog', 'gmp', 'gobject-introspection', 'gperftools', 'graphviz', 'gsl', 'gtest', 'gtk2', 'ice', 'lapack', 'libav', 'libbzip', 'libhidapi', 'libitpp', 'libjpeg', 'liblog4cpp', 'libpcap', 'libpng', 'libpolarssl', 'libshout', 'libsndfile', 'libtiff', 'libtool', 'libusb', 'libxml', 'libxslt', 'log4cxx', 'lxml', 'make', 'mcpp', 'mpc', 'mpfr', 'numpy', 'pango', 'perl', 'pixman', 'pulseaudio', 'pycairo', 'pygobject', 'pygtk', 'pyqt4', 'pyqt4-dev-tools', 'pyqwt5', 'python', 'python-scapy', 'python-zmq', 'qt4', 'qwt5', 'scipy', 'setuptools', 'sip', 'ssl', 'subversion', 'swig', 'tornado', 'wget', 'wxpython', 'x11', 'zeromq']}
Category: baseline
alsa installed deb
apr None
aprutil None
armadillo None
atk installed deb
autoconf installed deb
automake installed deb
bison None
blas None
boost installed deb
cairo installed deb
cheetah installed deb
cmake installed deb
cppunit installed deb
curl installed deb
db48 None
expat installed deb
faac None
faad None
ffi installed deb
fftw installed deb
flex installed deb
fontconfig installed deb
freetype installed deb
gcc installed deb
gdk-pixbuf installed deb
gflags None
gfortran installed deb
git installed deb
glib installed deb
glog None
gmp installed deb
gobject-introspection None
gperftools None
graphviz None
gsl installed deb
gtest None
gtk2 installed deb
ice None
lapack installed deb
libav None
libbzip installed deb
libhidapi None
libitpp None
libjpeg installed deb
liblog4cpp None
libpcap None
libpng installed deb
libpolarssl installed deb
libshout None
libsndfile None
libtiff installed deb
libtool installed deb
libusb installed deb
libxml installed deb
libxslt None
log4cxx None
lxml installed deb
make installed deb
mcpp None
mpc None
mpfr None
numpy installed deb
pango installed deb
perl installed deb
pixman installed deb
pulseaudio None
pycairo installed deb
pygobject None
pygtk installed deb
pyqt4 installed deb
pyqt4-dev-tools None
pyqwt5 installed deb
python installed deb
python-scapy None
python-zmq None
qt4 installed deb
qwt5 None
scipy installed deb
setuptools None
sip installed deb
ssl None
subversion None
swig installed deb
tornado None
wget installed deb
wxpython installed deb
x11 installed deb
zeromq None
Category: common
airprobe None
airspy None
fecapi None
gnss-sdr None
gqrx None
gqrx-digital None
gr-air-modes None
gr-ais None
gr-as None
gr-baz None
gr-benchmark None
gr-bluetooth None
gr-compat None
gr-drm None
gr-dsd None
gr-dvbs2 None
gr-dvbt None
gr-dvbt2 None
gr-elster None
gr-ettus None
gr-eventstream None
gr-extras None
gr-fcdproplus None
gr-gsm None
gr-ham None
gr-ieee-80211 None
gr-ieee-802154 None
gr-ldpc None
gr-lte None
gr-mediatools None
gr-mtb None
gr-multimon None
gr-op25 None
gr-packetradio None
gr-pcap None
gr-pocsag None
gr-pyqt None
gr-radar None
gr-rds None
gr-smartnet None
gr-smithchart None
gr-specest None
gr-tagutils None
gr-theano None
gr-tutorial None
gr-zmqblocks None
kal None
libbtbb None
libosmocore None
mbelib None
niusprio None
osmo-tetra None
pmc None
pocsag-mrt None
pysstv None
simple_radio_astronomy None
theron None
wireshark installed deb
Category: pseudo
all None