diff --git a/fakeroot-tcp/PKGBUILD b/fakeroot-tcp/PKGBUILD
index 549a8a3..a3ccd0e 100644
--- a/fakeroot-tcp/PKGBUILD
+++ b/fakeroot-tcp/PKGBUILD
@@ -38,7 +38,7 @@ build() {
   make
 
   cd doc
-  po4a -k 0 --rm-backups --variable "srcdir=../doc/" po4a/po4a.cfg
+  /usr/bin/vendor_perl/po4a -k 0 --rm-backups --variable "srcdir=../doc/" po4a/po4a.cfg
 }
 
 package() {
diff --git a/fakeroot-tcp/buildbot.update.d/config.sh b/fakeroot-tcp/buildbot.update.d/config.sh
index 5a54732..598fb56 100644
--- a/fakeroot-tcp/buildbot.update.d/config.sh
+++ b/fakeroot-tcp/buildbot.update.d/config.sh
@@ -6,7 +6,7 @@ PKGBUILD='PKGBUILD'
 
 # prepare upstream source
 prepare() {
-    true
+    sed -i 's/^\([ \t]*\)po4a/\1\/usr\/bin\/vendor_perl\/po4a/g' PKGBUILD
 }
 
 # which files to include, overrides exclude_files below