--- oesch-20080712.ebuild	2018-05-01 21:09:33.000000000 +0200
+++ oesch-20080712-r1.ebuild	2019-08-05 15:48:54.818359291 +0200
@@ -1,7 +1,7 @@
 # Copyright 1999-2018 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI=0
+EAPI=7
 
 inherit latex-package
 
@@ -24,6 +24,12 @@
 
 S=${WORKDIR}/${PN}
 
+src_prepare() {
+	default
+	sed -i.orig -e '/usepackage{oesch/a\\\usepackage[latin9]{inputenc}' \
+	    example.tex beispiel.tex
+}
+
 src_install() {
 	export VARTEXFONTS="${T}/fonts"
 	latex-package_src_install