diff --git a/l/zope.deferredimport/zope.deferredimport.SlackBuild b/l/zope.deferredimport/zope.deferredimport.SlackBuild
index 0b624d45..be446a80 100755
--- a/l/zope.deferredimport/zope.deferredimport.SlackBuild
+++ b/l/zope.deferredimport/zope.deferredimport.SlackBuild
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Build script for Slackware
-# Copyright (C) 2019 Damien Goutte-Gattat
+# Copyright (C) 2019,2020 Damien Goutte-Gattat
 #
 # Redistribution and use of this script, with or without modifications,
 # is permitted provided that the following conditions are met:
@@ -31,7 +31,6 @@
 NAMESRC=${NAMESRC:-zope.deferredimport}
 VERSION=${VERSION:-4.3.1}
 ARCHIVE=${ARCHIVE:-$NAMESRC-$VERSION.tar.gz}
-WGET=${WGET:-https://files.pythonhosted.org/packages/b9/74/6eb2dcf013fac35d086abef2435b5a6621435c2b0c166ef5b63a1b51e91d/$ARCHIVE}
 
 # Build infos
 NAMEPKG=${NAMEPKG:-zope.deferredimport}
@@ -45,6 +44,7 @@ TMP=${TMP:-/tmp}
 OUT=${OUT:-$TMP/build}
 PKG=${PKG:-$OUT/$NAMEPKG}
 CWD=$(pwd)
+PYTHONDIR=$(python3 -c 'import sysconfig; print(sysconfig.get_paths()["purelib"])')
 
 set -e  # Quit if a command returns non-zero
 
@@ -60,8 +60,7 @@ fi
 
 # Get and verify the source archive
 if [ ! -r $ARCHIVE ]; then
-    wget -c -O $ARCHIVE.part "$WGET"
-    mv $ARCHIVE.part $ARCHIVE
+    pip3 download --no-binary :all: --no-deps $NAMESRC==$VERSION
 fi
 sha256sum -c $ARCHIVE.sha256
 NAME=$(tar ft $ARCHIVE | head -n 1 | cut -d / -f 1)
@@ -71,8 +70,6 @@ cd $TMP
 echo "Building $ARCHIVE..."
 tar xf $CWD/$ARCHIVE
 cd $NAME
-python2 setup.py build
-python2 setup.py install --root=$PKG
 python3 setup.py build
 python3 setup.py install --root=$PKG
 
@@ -81,6 +78,12 @@ mkdir -p $PKG/usr/doc/$NAME
 install -m 644 CHANGES.rst COPYRIGHT.txt LICENSE.txt README.rst \
   $PKG/usr/doc/$NAME
 
+# Build HTML docs if possible
+export PYTHONPATH=$PKG$PYTHONDIR
+if sphinx-build -b html docs $PKG/usr/doc/$NAME/html ; then
+    rm -rf $PKG/usr/doc/$NAME/html/.{buildinfo,doctrees}
+fi
+
 # Copy slack-desc file
 install -D -m 644 $CWD/slack-desc $PKG/install/slack-desc