-n, --ignore-dependencies option added.

src/main.cr

@@ -18,6 +18,7 @@ requested_recipes = [] of String
 download_only = false
 do_not_clean = false
 watch_only = false
+skip_build_dependencies = false
 
 used_X = false
 OptionParser.parse! do |parser|
@@ -68,6 +69,10 @@ OptionParser.parse! do |parser|
 		context.verbosity -= 1
 	}
 
+	parser.on("-n", "--ignore-dependencies", "Do not try to install build-dependencies.") {
+		skip_build_dependencies = true
+	}
+
 	parser.invalid_option do |flag|
 		STDERR.puts "ERROR: #{flag} is not a valid option."
 		STDERR.puts parser
@@ -132,7 +137,7 @@ begin
 		end
 	end
 
-	if dependencies.size > 0
+	if dependencies.size > 0 && ! skip_build_dependencies
 		# FIXME: We’ll probably want to have backends other than apk at some point.
 		opts = ["add"] + (ENV["APK_FLAGS"]? || "-i").split(/[ \t]+/) + dependencies
 		puts "+ apk #{opts.join " "}"