On 09/06/2015 08:30 AM, Gianfranco Costamagna wrote: > dpkg -s nvidia-cuda-toolkit | grep -o installed
"installed" is also part of the output of a non-installed package. Still not 100% failproof alternative: 19 ifeq (installed, $(shell dpkg -s nvidia-cuda-toolkit | grep Status | grep -o installed)) or (untested and I don't know if there are valid alternatives): 19 if ($(shell dpkg -s nvidia-cuda-toolkit | grep -o "Status: install ok installed") Greets jre
