nix

nix-env -iA PACKAGE 		# install a package
nix-env -qaP PACKAGE 		# search for a package
nix-env -uA PACKAGE 		# update a specific package
nix-env -u 			# update all packages
nix-env -e PACKAGE 		# uninstall package
nix-env -qa --installed "*" 	# list all installed packages