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