well there's more nixification that could be done, but this fixes my biggest gripe atm (deps fetching)

build.sh

@@ -1,6 +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 $?
+if ! [[ -d pgvv/ ]]; then
+	python3 -m venv pgvv
+	source ./pgvv/bin/activate
+	python3 -m pip install --upgrade pip
+	pip install --upgrade pygments
+	deactivate
+fi
 
 find acl.cool/serve/ ytheleus.org/serve/ -type f -mmin +11 -delete
 
@@ -16,7 +24,7 @@ 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 +34,7 @@ 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 +49,7 @@ for font in \
         --layout-features='*' \
         --passthrough-tables
 
-    ./woff2/woff2_compress "$subset_ttf"
+    woff2_compress "$subset_ttf"
 
     rm "$subset_ttf"
 done

deps.sh

@@ -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