Hi, I was wondering if someone knows how to install Octave packages, when i try i get the following

Code:
octave:5> pkg install signal-1.0.7.tar.gz
make: mkoctfile: Command not found
make: *** [remez.oct] Error 127
error: 'make' returned the following error: make: Entering directory `/tmp/oct-Eo2mX0/signal-1.0.7/src'
mkoctfile -s remez.cc
make: Leaving directory `/tmp/oct-Eo2mX0/signal-1.0.7/src'
error: called from `pkg:configure_make' in file /usr/share/octave/3.0.0/m/pkg/pkg.m near line 1058, column 2
thanks for any help.