i2p: use jre_minimal

pkgs/by-name/i2/i2p/package.nix

@@ -2,7 +2,8 @@
   lib,
   stdenv,
   fetchzip,
-  jdk,
+  jdk_headless,
+  jre_minimal,
   ant,
   gettext,
   which,
@@ -12,6 +13,22 @@
   gmp,
 }:
 
+let
+  jre = jre_minimal.override {
+    modules = [
+      "java.base"
+      "java.desktop"
+      "java.instrument"
+      "java.logging"
+      "java.management"
+      "java.naming"
+      "java.rmi"
+      "java.security.jgss"
+      "java.sql"
+      "java.xml"
+    ];
+  };
+in
 stdenv.mkDerivation (finalAttrs: {
   pname = "i2p";
   version = "2.10.0";
@@ -34,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
     makeWrapper
     ant
     gettext
-    jdk
+    jdk_headless
     which
   ];
 
@@ -77,7 +94,7 @@ stdenv.mkDerivation (finalAttrs: {
       fi
     done
 
-    makeWrapper ${jdk}/bin/java $out/bin/i2prouter \
+    makeWrapper ${jre}/bin/java $out/bin/i2prouter \
       --add-flags "-cp $CP -Djava.library.path=$out/lib/ -Di2p.dir.base=$out -DloggerFilenameOverride=logs/log-router-@.txt" \
       --add-flags "net.i2p.router.RouterLaunch"