diff --git a/update.texlive b/update.texlive
index 3bc9d6e..0142fc6 100644
--- a/update.texlive
+++ b/update.texlive
@@ -207,8 +207,8 @@ has_formats()
 	test ${line[2]} = "-" && continue
 	let last=${#line[@]}
 	let last--
-	TEXMF=$TEXMFSYSCONFIG kpsewhich -progname=${line[0]} -format=tex ${line[last]#\*} &>/dev/null || continue
-	hyphen=$(TEXMF=$TEXMFSYSCONFIG kpsewhich -progname=${line[0]} -format=tex ${line[2]} 2>/dev/null)
+	kpsewhich -progname=${line[0]} -format=tex ${line[last]#\*} &>/dev/null || continue
+	hyphen=$(kpsewhich -progname=${line[0]} -format=tex ${line[2]} 2>/dev/null)
 	test -n "$hyphen" -a -e "$hyphen" -a "$hyphen" = "$1" || continue
 	return 0
     done