diff --git a/.gitignore b/.gitignore
index 474022f..95757f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,5 +4,4 @@ css/code.css
 pgvv/
 all_chars.txt
 **/fonts/**/*-Subset.*
-woff2/
-**/serve_*
+woff2/
\ No newline at end of file
diff --git a/acl.cool/site/assets/EasySalsa.pdf.draft b/acl.cool/site/assets/EasySalsa.pdf.draft
deleted file mode 100644
index 060b56d..0000000
Binary files a/acl.cool/site/assets/EasySalsa.pdf.draft and /dev/null differ
diff --git a/build.sh b/build.sh
index b637f49..675d5f4 100755
--- a/build.sh
+++ b/build.sh
@@ -1,14 +1,8 @@
-#! /usr/bin/env nix-shell
-#! nix-shell -i bash --pure
-#! nix-shell -p bash harfbuzz soupault woff2 jotdown python3 --pure
+#!/bin/bash
 
-if ! [[ -d pgvv/ ]]; then
-	python3 -m venv pgvv
-	source ./pgvv/bin/activate
-	python3 -m pip install --upgrade pip
-	pip install --upgrade pygments
-	deactivate
-fi
+./deps.sh || exit $?
+
+find acl.cool/serve/ ytheleus.org/serve/ -type f -mmin +11 -delete
 
 function soup_config {
     rm soupault.toml
@@ -22,7 +16,7 @@ find acl.cool/site/ ytheleus.org/site/ -type f \( -name '*.dj' -o -name '*.html'
 cat common_chars.txt >>all_chars.txt
 
 for font in fonts/JuliaMono/*{-Light,-Regular,-SemiBold}{,Italic}.woff2; do
-    woff2_decompress "$font"
+    ./woff2/woff2_decompress "$font"
     ttf_font="${font%.woff2}.ttf"
 
     subset_ttf="${ttf_font%.ttf}-Subset.ttf"
@@ -32,7 +26,7 @@ for font in fonts/JuliaMono/*{-Light,-Regular,-SemiBold}{,Italic}.woff2; do
         --layout-features='*' \
         --passthrough-tables
 
-    woff2_compress "$subset_ttf"
+    ./woff2/woff2_compress "$subset_ttf"
 
     rm "$subset_ttf" "$ttf_font"
 done
@@ -47,7 +41,7 @@ for font in \
         --layout-features='*' \
         --passthrough-tables
 
-    woff2_compress "$subset_ttf"
+    ./woff2/woff2_compress "$subset_ttf"
 
     rm "$subset_ttf"
 done
@@ -58,20 +52,10 @@ pygmentize -f html -S algol_nu | grep -v 'line-height' >css/code.css
 builtin pushd acl.cool
 soup_config
 soupault
-
-NEXT_DIR="serve_$(date +%s)"
-cp -a serve "$NEXT_DIR"
-ln -sfn "$NEXT_DIR" serve_
-
 popd
 builtin pushd ytheleus.org
 soup_config
 soupault
-
-NEXT_DIR="serve_$(date +%s)"
-cp -a serve "$NEXT_DIR"
-ln -sfn "$NEXT_DIR" serve_
-
 popd
 
 deactivate
diff --git a/css/index.css b/css/index.css
new file mode 100644
index 0000000..753f81a
--- /dev/null
+++ b/css/index.css
@@ -0,0 +1,7 @@
+@import url(fonts.css);
+
+@import url(looks.css);
+
+@import url(layout.css);
+
+@import url(code.css);
\ No newline at end of file
diff --git a/deps.sh b/deps.sh
new file mode 100755
index 0000000..8401ea6
--- /dev/null
+++ b/deps.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+if ! [[ -d pgvv/ ]]; then
+	python3 -m venv pgvv
+	source ./pgvv/bin/activate
+	python3 -m pip install --upgrade pip
+	pip install --upgrade pygments
+	# pip install --upgrade fonttools
+	# pip install --upgrade brotli
+	deactivate
+fi
+
+which hb-subset
+if ! [[ $? == 0 ]]; then
+	echo 'please install hb-subset (provided by harfbuzz-devel on RedHat)'
+	exit 6
+fi
+
+which opam 2> /dev/null
+if [[ $? == 0 ]]; then
+	opam install -y soupault
+else
+	echo 'failed to install soupault with opam' >&2
+	exit 2
+fi
+
+which cargo 2> /dev/null
+if [[ $? == 0 ]]; then
+	cargo install jotdown
+else
+	echo 'failed to install jotdown with cargo'
+	exit 3
+fi
+
+which git 2> /dev/null
+if ! [[ $? == 0 ]]; then
+	echo 'you need git'
+	exit 4
+fi
+
+which cc 2> /dev/null
+if ! [[ $? == 0 ]]; then
+	echo 'you need a C compiler'
+	exit 5
+fi
+
+if ! [[ -d woff2/ ]]; then
+	git clone https://github.com/mobotsar/woff2.git --recursive || exit 7
+	builtin pushd woff2
+	make clean all || exit 8
+	popd
+fi
\ No newline at end of file
diff --git a/shared_templates/main.html b/shared_templates/main.html
index 8303b84..ac13523 100644
--- a/shared_templates/main.html
+++ b/shared_templates/main.html
@@ -4,10 +4,7 @@
   <meta charset="utf-8">
   <title> <!-- set automatically, see soupault.conf --> </title>
   <meta name="viewport" content="width=device-width, initial-scale=1">
-  <link rel="stylesheet" href="/css/fonts.css">
-  <link rel="stylesheet" href="/css/layout.css">
-  <link rel="stylesheet" href="/css/looks.css">
-  <link rel="stylesheet" href="/css/code.css">
+  <link rel="stylesheet" href="/css/index.css">
   <link rel="icon" type="image/png" href="/assets/favicon.png">
   <script>
     const class_ = `font-${window.devicePixelRatio >= 1.3 ? 'hidpi' : 'lodpi'}`;