diff --git a/Makefile b/Makefile
index 1b85fc44d..bd7daf3ab 100644
--- a/Makefile
+++ b/Makefile
@@ -89,8 +89,8 @@ sources13 := \
 sources := $(foreach i,$(parts),$(sources$(i)))
 
 imports := \
- node_modules/font-awesome/package.json \
- $(wildcard src/Linkification/icons/*.png) \
+ tmp/font-awesome.css \
+ tmp/style.css \
  src/Archive/archives.json \
  src/meta/icon48.png \
  $(wildcard src/Monitoring/Favicon/*/*.png) \
@@ -103,6 +103,12 @@ imports := \
  $(wildcard src/css/*.css) \
  .tests_enabled
 
+imports_font_awesome := \
+ node_modules/font-awesome/css/font-awesome.css \
+ node_modules/font-awesome/fonts/fontawesome-webfont.woff
+imports_style := \
+ $(wildcard src/Linkification/icons/*.png)
+
 crx_contents := script.js eventPage.js icon16.png icon48.png icon128.png manifest.json
 
 bds := \
@@ -132,12 +138,18 @@ all : jshint bds install
 	npm install
 	echo -> $@
 
-node_modules/%/package.json : .events/npm
+node_modules/% : .events/npm
 	
 
 .tests_enabled :
 	echo false> .tests_enabled
 
+tmp/font-awesome.css : src/css/font-awesome.css $(imports_font_awesome) $(template_deps) | tmp
+	$(template) $< $@
+
+tmp/style.css : src/css/style.css $(imports_style) $(template_deps) | tmp
+	$(template) $< $@
+
 define rules_part
 
 tmp/parts/script$1.coffee : $$(sources$1) $(cat_deps) | tmp/parts
diff --git a/src/General/Main.coffee b/src/General/Main.coffee
index 0feaca120..44182c7c8 100644
--- a/src/General/Main.coffee
+++ b/src/General/Main.coffee
@@ -391,7 +391,7 @@ Main =
     $.ready ->
       cb() if Main.isThisPageLegit()
 
-  css: `<%= importCSS('font-awesome', 'style', 'yotsuba', 'yotsuba-b', 'futaba', 'burichan', 'tomorrow', 'photon', 'supports') %>`
+  css: `<%= importCSS('../../tmp/font-awesome', '../../tmp/style', 'yotsuba', 'yotsuba-b', 'futaba', 'burichan', 'tomorrow', 'photon', 'supports') %>`
 
   cssWWW: `<%= importCSS('www') %>`
 
diff --git a/src/Linkification/Linkify.coffee b/src/Linkification/Linkify.coffee
index 2b67337c8..f531be459 100644
--- a/src/Linkification/Linkify.coffee
+++ b/src/Linkification/Linkify.coffee
@@ -74,7 +74,7 @@ Linkify =
 
         if Linkify.regString.test word
           links.push Linkify.makeRange node, endNode, index, length
-          <%= assert('word is links[links.length-1].toString()') %>
+          <%= assert('.tests_enabled', 'word is links[links.length-1].toString()') %>
 
         break unless test.lastIndex and node is endNode
 
diff --git a/tools/template.js b/tools/template.js
index e5bffaf8a..49792f7d9 100644
--- a/tools/template.js
+++ b/tools/template.js
@@ -4,29 +4,26 @@ var _ = require('lodash');
 // disable ES6 delimiters
 _.templateSettings.interpolate = /<%=([\s\S]+?)%>/g;
 
-var pkg = {};
+var obj = {};
 
-var read     = pkg.read     = filename => fs.readFileSync(filename, 'utf8').replace(/\r\n/g, '\n');
-var readJSON = pkg.readJSON = filename => JSON.parse(read(filename));
-pkg.readBase64              = filename => fs.readFileSync(filename).toString('base64');
-pkg.ls                      = pathname => fs.readdirSync(pathname);
-
-_.assign(pkg,      readJSON('package.json'));
-_.assign(pkg.meta, readJSON('version.json'));
+var read     = obj.read     = filename => fs.readFileSync(filename, 'utf8').replace(/\r\n/g, '\n');
+var readJSON = obj.readJSON = filename => JSON.parse(read(filename));
+obj.readBase64              = filename => fs.readFileSync(filename).toString('base64');
+obj.ls                      = pathname => fs.readdirSync(pathname);
 
 // Convert JSON object to Coffeescript expression (via embedded JS).
 var constExpression = data => '`' + JSON.stringify(data).replace(/`/g, '\\`') + '`';
 
-pkg.importCSS = function() {
+obj.importCSS = function() {
   var text = Array.prototype.slice.call(arguments).map(name => read(`src/css/${name}.css`)).join('');
-  text = _.template(text)(pkg);
+  text = _.template(text)(pkg); // variables only; no recursive imports
   return text.trim().replace(/\n+/g, '\n').split(/^/m).map(JSON.stringify).join(' +\n').replace(/`/g, '\\`');
 };
 
-pkg.importHTML = function(filename) {
+obj.importHTML = function(filename) {
   var text = read(`src/${filename}.html`).replace(/^ +/gm, '').replace(/\r?\n/g, '');
-  text = _.template(text)(pkg);
-  return pkg.html(text);
+  text = _.template(text)(pkg); // variables only; no recursive imports
+  return obj.html(text);
 };
 
 function TextStream(text) {
@@ -155,7 +152,7 @@ Placeholder.prototype.build = function() {
 
 // HTML template generator with placeholders of forms ${}, &{}, @{}, and ?{}{}{} (see Placeholder.prototype.build)
 // that checks safety of generated expressions at compile time.
-pkg.html = function(template) {
+obj.html = function(template) {
   var stream = new TextStream(template);
   var output = parseHTMLTemplate(stream);
   if (stream.text) {
@@ -164,16 +161,23 @@ pkg.html = function(template) {
   return `(innerHTML: ${output})`;
 };
 
-pkg.assert = function(statement) {
-  if (!pkg.tests_enabled) return '';
+obj.assert = function(flagFile, statement) {
+  if (!readJSON(flagFile)) return '';
   return `throw new Error 'Assertion failed: ' + ${constExpression(statement)} unless ${statement}`;
 };
 
+// Import variables from package.json and version.json.
+var pkg = readJSON('package.json');
+_.assign(pkg.meta, readJSON('version.json'));
+
+// Take variables from command line.
 for (var i = 4; i < process.argv.length; i++) {
   var m = process.argv[i].match(/(.*?)=(.*)/);
   pkg[m[1]] = m[2];
 }
 
+_.assign(obj, pkg);
+
 var text = read(process.argv[2]);
-text = _.template(text)(pkg);
+text = _.template(text)(obj);
 fs.writeFileSync(process.argv[3], text);