diff --git a/patches/pkgbuild/xz.sh b/patches/pkgbuild/xz.sh
index 2cc4849..269a029 100755
--- a/patches/pkgbuild/xz.sh
+++ b/patches/pkgbuild/xz.sh
@@ -20,3 +20,30 @@ ZZPY
 grep -q -- "autogen.sh --no-po4a" PKGBUILD || {
     echo "xz: --no-po4a was not added" >&2; exit 1; }
 echo "xz: translated man pages skipped"
+
+# --- and no doxygen API reference ---------------------------------------------
+#
+# With po4a out of the way, the build got as far as
+#
+#   ../../../doxygen/update-doxygen: 'doxygen' command not found
+#   make[4]: *** [Makefile:642: ../../../doc/api/index.html] Error 1
+#
+# Two documentation toolchains in one package: po4a for the translated man pages,
+# doxygen for the liblzma API reference. --disable-doc is xz's own switch, and it
+# was checked in configure before use -- both --disable-doc and --enable-doc are
+# there.
+set -euo pipefail
+python3 - <<'ZZPY'
+import io, re
+lines = io.open("PKGBUILD", encoding="utf-8").read().split("\n")
+hit = [i for i, l in enumerate(lines) if re.match(r"^[ \t]*\./configure[ \t]*\\\\?$", l)]
+assert len(hit) == 1, "xz: expected one ./configure line, got %d" % len(hit)
+i = hit[0]
+ind = re.match(r"^[ \t]*", lines[i]).group(0)
+assert lines[i].rstrip().endswith("\\"), "xz: ./configure does not continue"
+lines.insert(i + 1, ind + "  --disable-doc \\")
+io.open("PKGBUILD", "w", encoding="utf-8").write("\n".join(lines))
+ZZPY
+grep -A1 -E "^[[:space:]]*\./configure" PKGBUILD | grep -q -- "--disable-doc" || {
+    echo "xz: --disable-doc is not on the configure line" >&2; exit 1; }
+echo "xz: doxygen API reference disabled"
diff --git a/scripts/packages.sh b/scripts/packages.sh
index cb0815f..cefe19b 100644
--- a/scripts/packages.sh
+++ b/scripts/packages.sh
@@ -302,6 +302,15 @@ STAGE1_PACKAGES=(
     python-pkgconfig
     cython
     autoconf-archive
+    # publicsuffix-list: DATA, not a tool. libpsl stops on
+    #
+    #   make: *** No rule to make target
+    #     '/usr/share/publicsuffix/effective_tld_names.dat', needed by ...
+    #
+    # It compiles the Public Suffix List into a lookup table, so the list itself
+    # is an input to the build. First entry in this port whose absence is neither
+    # a program nor a library.
+    publicsuffix-list
     # libaio: a real closure gap. lvm2 stops on
     #
     #   device/bcache.c:30:10: fatal error: libaio.h: No such file or directory