diff --git a/examples/logic/eval b/examples/logic/eval
index b917e91..dc41896 100755
--- a/examples/logic/eval
+++ b/examples/logic/eval
@@ -14,6 +14,10 @@ def evaluate(node):
 		return (evaluate(node["children"][0]) and evaluate(node["children"][1]))
 	elif (node["label"] == "disjunction"):
 		return (evaluate(node["children"][0]) or evaluate(node["children"][1]))
+	elif (node["label"] == "priorised"):
+		return evaluate(node["children"][0])
+	else:
+		raise ValueError("unhandled label: " + node["label"])
 	
 
 def main():
diff --git a/source/type2.ts b/source/type2.ts
index 07b6d3d..c1e1475 100644
--- a/source/type2.ts
+++ b/source/type2.ts
@@ -1,7 +1,7 @@
 /*
 This file is part of »type2«.
 
-Copyright 2016-2018 'Christian Fraß, Christian Neubauer, Martin Springwald GbR'
+Copyright 2016-2021 'Christian Fraß, Christian Neubauer, Martin Springwald GbR'
 <info@greenscale.de>
 
 »type2« is free software: you can redistribute it and/or modify
@@ -38,7 +38,7 @@ async function generate_reader(
 	path : string
 ) : Promise<type_myreader>
 {
-	const content : string = await lib_file.read_promise(path);
+	const content : string = await lib_plankton.file.read(path);
 	const data : any = JSON.parse(content);
 	const reader : type_myreader = lib_plankton.lang.class_reader.default_raw(data);
 	return Promise.resolve<type_myreader>(reader);
@@ -84,7 +84,7 @@ async function main(
 		process.stdout.write(
 			args_handler.generate_help({
 				"programname": "type2",
-				"description": "reads a string from stdin and parses it according to a given grammar to an abstract JSON output",
+				"description": "reads a string from stdin and parses it according to a given grammar to an abstract syntax tree as JSON",
 				"author": "Christian Fraß <frass@greenscale.de>",
 				"executable": "type2",
 			})
@@ -111,7 +111,7 @@ async function main(
 		
 		// exec
 		const reader : type_myreader = await generate_reader(args["path"]);
-		const input_raw : string = await lib_file.read_stdin();
+		const input_raw : string = await lib_plankton.file.read_stdin();
 		const result : type_resulttree = reader.run(input_raw.split(""));
 		if (result === null) {
 			return Promise.reject<void>(new Error("reading failed"));
diff --git a/tools/makefile b/tools/makefile
index cd98f68..21c2f0b 100644
--- a/tools/makefile
+++ b/tools/makefile
@@ -7,7 +7,7 @@ cmd_log := echo "--"
 cmd_directory_create := mkdir -p
 cmd_concatenate := cat
 cmd_chmod := chmod
-cmd_typescript_compile := tsc --lib es2018
+cmd_typescript_compile := tsc --removeComments --lib es2018
 
 ## rules
 build/type2: source/head.js lib/plankton/plankton.js temp/unlinked.js
diff --git a/tools/update-plankton b/tools/update-plankton
index cf0b6b2..3962356 100755
--- a/tools/update-plankton
+++ b/tools/update-plankton
@@ -1,7 +1,6 @@
 #!/usr/bin/env sh
 
 modules=""
-modules="${modules} call"
 modules="${modules} args"
 modules="${modules} file"
 modules="${modules} lang"