use jdk8_headless

Author: moesoha

default.nix

@@ -7,10 +7,12 @@ in with pkgs; {
 	# Basic utils
 	inherit coreutils;
 	inherit bash;
-	inherit gnutar;
-	inherit openssl;
 	checker = (callPackage ./checker { inherit pkgs; });
 
+	# for AnswerFile
+	inherit gnutar;
+	inherit gzip;
+
 	# C, C++
 	gcc = (callPackage ./gcc-luogu { inherit pkgs; }).gcc;
 
@@ -48,7 +50,7 @@ in with pkgs; {
 	inherit mono;
 
 	# Java 8
-	inherit jdk8;
+	jdk8 = jdk8_headless;
 
 	# OCaml
 	inherit ocaml;