diff --git a/extra/texlive-bin/PKGBUILD b/extra/texlive-bin/PKGBUILD
index 0eb0f0f35..7747fcb52 100644
--- a/extra/texlive-bin/PKGBUILD
+++ b/extra/texlive-bin/PKGBUILD
@@ -9,7 +9,7 @@
 
 pkgname=texlive-bin
 pkgver=2012.0
-pkgrel=2
+pkgrel=3
 pkgdesc="TeX Live binaries"
 license=('GPL')
 arch=('i686' 'x86_64')
diff --git a/extra/texlive-bin/texlive.install b/extra/texlive-bin/texlive.install
index b85850123..06a40a3b3 100644
--- a/extra/texlive-bin/texlive.install
+++ b/extra/texlive-bin/texlive.install
@@ -16,13 +16,19 @@ post_install() {
 }
 
 post_upgrade() {
+  local corename corever _pacout
   echo    ">>> texlive: updating the filename database..."
   usr/bin/mktexlsr
-  echo -n   "recreating all formats..."
-  usr/bin/fmtutil-sys --all 1>/dev/null
-  echo      " done." 
-  echo      " (logs are under /var/lib/texmf/web2c/<engine>/<formatname>.log)"
-
+  _pacout=$(pacman -Q texlive-core 2>/dev/null)
+  read corename corever <<< ${_pacout}
+  if [[ ${corever} == 2012* ]]; then
+      echo -n   "recreating all formats..."
+      usr/bin/fmtutil-sys --all 1>/dev/null
+      echo      " done." 
+      echo      " (logs are under /var/lib/texmf/web2c/<engine>/<formatname>.log)"
+  else
+      echo "WARNING: not recreating formats since texlive-core has version '$corever'"
+  fi
   [[ -x usr/bin/install-info ]] || return 0
   for file in "${filelist[@]}"; do
     install-info "$infodir/$file.gz" "$infodir/dir" 2> /dev/null