diff --git a/debian/README.source b/debian/README.source
new file mode 100644
index 0000000..4163b01
--- /dev/null
+++ b/debian/README.source
@@ -0,0 +1 @@
+cf. https://intra.evolix.net/paquets%20Debian#construction-de-paquet
diff --git a/debian/gbp.conf b/debian/gbp.conf
index afd74a1..20cc3ec 100644
--- a/debian/gbp.conf
+++ b/debian/gbp.conf
@@ -1,5 +1,5 @@
-[buildpackage]
-upstream-tree = debian
+[DEFAULT]
 debian-branch = debian
-export-dir = /tmp/evoadmin-mail
+upstream-branch = upstream/latest
+upstream-vcs-tag = %(version%~%-)s
 builder = dpkg-buildpackage -i -I -uc -us
diff --git a/debian/watch b/debian/watch
new file mode 100644
index 0000000..1ec4f7b
--- /dev/null
+++ b/debian/watch
@@ -0,0 +1,5 @@
+version=4
+options=uversionmangle=s/-?([^\d.]+)/~$1/i;tr/A-Z/a-z/,\
+mode=git,gitmode=full,gitexport=all \
+https://gitea.evolix.org/evolix/evoadmin-mail \
+refs/tags/v?(\d.+)