Undefined symbols for architecture x86_64

[stuzog]

bash$ brew install gnuradio-osmosdr
==> Installing gnuradio-osmosdr from godber/godber
==> Downloading http://cgit.osmocom.org/gr-osmosdr/snapshot/gr-osmosdr-0.1.4.zip
######################################################################## 100.0%
==> Downloading https://pypi.python.org/packages/source/M/Markdown/Markdown-2.4.tar.gz
######################################################################## 100.0%
==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/gnuradio-osmosdr/0.1.4/l
==> Downloading https://pypi.python.org/packages/source/C/Cheetah/Cheetah-2.4.4.tar.gz
######################################################################## 100.0%
==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/gnuradio-osmosdr/0.1.4/l
==> cmake .. -DPYTHON_LIBRARY=/usr/local/Frameworks/Python.framework/Versions/2.7/Python -DCMAKE_C_FLAGS_RE
==> make
Last 15 lines from /Users/Stuart/Library/Logs/Homebrew/gnuradio-osmosdr/04.make:
Undefined symbols for architecture x86_64:
"_rtlsdr_get_index_by_serial", referenced from:
rtl_source_c::rtl_source_c(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&) in rtl_source_c.cc.o
"_rtlsdr_set_agc_mode", referenced from:
rtl_source_c::rtl_source_c(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&) in rtl_source_c.cc.o
rtl_source_c::set_gain_mode(bool, unsigned long) in rtl_source_c.cc.o
"_rtlsdr_set_direct_sampling", referenced from:
rtl_source_c::rtl_source_c(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&) in rtl_source_c.cc.o
"_rtlsdr_set_offset_tuning", referenced from:
rtl_source_c::rtl_source_c(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&) in rtl_source_c.cc.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/libgnuradio-osmosdr.0.1.4.dylib] Error 1
make[1]: *** [lib/CMakeFiles/gnuradio-osmosdr.dir/all] Error 2
make: *** [all] Error 2

If reporting this issue please do so at (not Homebrew/brew or Homebrew/core):
https://github.com/godber/homebrew-godber/issues

bash$