I am trying to install mixtools on Debian Etch and get the following error dell-2 /usr/lib # R CMD INSTALL mixtools_0.1.0.tar.gz * Installing *source* package 'mixtools' ... ** libs gcc -I/usr/share/R/include -I/usr/share/R/include -fpic -g -O2 -std=gnu99 -c new_svalues.c -o new_svalues.o gfortran -fpic -g -O2 -c sphericaldepth.f -o sphericaldepth.o make: gfortran: Command not found make: *** [sphericaldepth.o] Error 127 ERROR: compilation failed for package 'mixtools' ** Removing '/usr/local/lib/R/site-library/mixtools' I have upgraded my installation of libgfortran and have added /usr/lib to PATH but the error persists. The same file has installed perfectly on a similar machine. I am not sure how to proceed from here. thanks Dave