make brew & apt-get conditional on existence
make brew & apt-get conditional on existence

saizai/MakeYourLaws,MakeYourLaws/MakeYourLaws,saizai/MakeYourLaws,saizai/MakeYourLaws,MakeYourLaws/MakeYourLaws,MakeYourLaws/MakeYourLaws,MakeYourLaws/MakeYourLaws,saizai/MakeYourLaws