diff --git a/Dockerfile b/Dockerfile
index be03e9c..b5169eb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,7 +35,6 @@ RUN export DEBUGINFOD_URLS=https://debuginfod.archlinux.org \
 		"$debugdir/${buildid#??}.debug" \
 	&& rm -rf /root/.cache/debuginfod_client
 
-RUN printf "egrep='grep -E'\n" > /usr/lib/plan9/config
 RUN dbus-uuidgen --ensure=/etc/machine-id
 
 ENV PLAN9=/usr/lib/plan9
diff --git a/README.md b/README.md
index c074a15..2269a77 100644
--- a/README.md
+++ b/README.md
@@ -183,16 +183,18 @@ is not started and the popup is disabled.
 
 ## Dictionary data
 
-After changing an input source, regenerate and verify the dictionaries:
+After changing an input source, regenerate and verify the maps and
+dictionaries:
 
 ```sh
+python3 map/mktelex.py >map/telex.map
 map/mkemoji >map/emoji.dict
 map/mkhanja >map/hanja.dict
 make verify-map
 ```
 
-See [`map/README`](map/README) for Hanja import and Japanese dictionary
-generation.
+See [`map/README`](map/README) for the emoji, Hanja, and Japanese data and
+where it comes from.
 
 ## Benchmark
 
diff --git a/map/skk2ktrans b/map/skk2ktrans
index a00157e..8732469 100755
--- a/map/skk2ktrans
+++ b/map/skk2ktrans
@@ -36,10 +36,16 @@ function add(k, v, id) {
 		row[k] = row[k] " "
 	row[k] = row[k] v
 }
-/^;;/ || /^[[:space:]]*$/ {
+/^;;/ {
+	if(!body)		# the header, with its license notice, is kept
+		print
+	next
+}
+/^[[:space:]]*$/ {
 	next
 }
 {
+	body = 1
 	if(!match($0, /[[:space:]]+/))
 		fail("missing candidate list")
 	key = substr($0, 1, RSTART-1)
diff --git a/tests/data/skk/expected.tsv b/tests/data/skk/expected.tsv
index 9f2a6ae..d2b5a06 100644
--- a/tests/data/skk/expected.tsv
+++ b/tests/data/skk/expected.tsv
@@ -1,3 +1,4 @@
+;; converter fixture; the test transcodes this file to EUC-JP
 かんじ	漢字 幹事 感じ
 えがお	笑顔
 きごう	記号 普通