Compiling Asterisk on Debian: Cannot Find `ptlib-config`

My Asterisk ./configure is returning: checking /root/pwlib/include/ptlib.h usability... no checking /root/pwlib/include/ptlib.h presence... no checking for /root/pwlib/include/ptlib.h... no checking /usr/local/include/ptlib.h usability... no checking /usr/local/include/ptlib.h presence... no checking for /usr/local/include/ptlib.h... no checking /usr/include/ptlib.h usability... yes checking /usr/include/ptlib.h presence... yes checking for /usr/include/ptlib.h... yes checking for ptlib-config... no ./configure: line 27253: --ldflags: command not found Cannot find ptlib-config - please install and try again However I clearly have ptlib-dev installed: # dpkg --list libpt* ii libpt-dbg 2.10.4~dfsg-1 ii libpt-dev 2.10.4~dfsg-1 ii libpt-doc 2.10.4~dfsg-1 ii libpt2.10.4 2.10.4~dfsg-1 ii libpth20 2.0.7-16 ii libpthread-stubs0:amd64 0.3-3 ii libpthread-stubs0-dev:amd64 0.3-3