diff --git a/.gitignore b/.gitignore
index 71efb0c..6f87383 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ vim_faq/
 body.tex
 *.fdb_latexmk
 *.fls
+final_preamble.tex
diff --git a/Makefile b/Makefile
index 6fc65be..5a05bba 100644
--- a/Makefile
+++ b/Makefile
@@ -40,10 +40,10 @@ update:
 $(docdir):
 	./update.sh
 
-vimhelp.tex vimhelp-a4.tex vimhelp-ipad.tex: preamble.tex
+vimhelp.tex vimhelp-a4.tex vimhelp-ipad.tex: final_preamble.tex
 
-preamble.tex: FORCE
-	sed -i -e '/^\\usepackage{fontspec}/ {n;N;s/.*/$(subst_text)/}' preamble.tex
+final_preamble.tex: preamble.tex
+	sed -e '/^\\usepackage{fontspec}/ {n;N;s/.*/$(subst_text)/}' preamble.tex > final_preamble.tex
 
 %.pdf: %.tex body.tex FORCE
 	xelatex $<
diff --git a/vimhelp.tex b/vimhelp.tex
index 06fbf96..2a82f4b 100644
--- a/vimhelp.tex
+++ b/vimhelp.tex
@@ -1,6 +1,6 @@
 \documentclass{article}
 \usepackage[margin=1in]{geometry}
-\input{preamble}
+\input{final_preamble}
 \begin{document}\phantomsection{}
 
 \include{body}