diff --git a/PKGBUILD b/PKGBUILD
index be9612e..6118098 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -18,12 +18,12 @@ _GRUB_EMU_BUILD="0"
 pkgname='grub'
 pkgdesc='GNU GRand Unified Bootloader (2)'
 epoch=2
-_tag='7d42d00f0e314f1535752bd5126a6b8d1be3352b' # git rev-parse grub-${_pkgver}
+_tag='53c5000739db114c229fe69ec3d4b76b92441098' # git rev-parse grub-${_pkgver}
 _gnulib_commit='be584c56eb1311606e5ea1a36363b97bddb6eed3'
 _unifont_ver='13.0.06'
-_pkgver=2.06-rc1
+_pkgver=2.06
 pkgver=${_pkgver/-/}
-pkgrel=2
+pkgrel=0
 url='https://www.gnu.org/software/grub/'
 arch=('x86_64')
 license=('GPL3')
diff --git a/grub.install b/grub.install
index 1dbae6f..7c4df5b 100644
--- a/grub.install
+++ b/grub.install
@@ -8,7 +8,8 @@ post_upgrade() {
   fi
 
   # https://md.archlinux.org/F1JuYj5xQtWyhvH8_ilErg#
-  cat <<EOM
+  if [[ -e /sys/firmware/efi/efivars ]]; then
+    cat <<EOM
 :: Recent versions of grub may fail to boot with secure boot enabled. The
    message will look like this:
     > error: verification requested but nobody cares:
@@ -17,6 +18,7 @@ post_upgrade() {
    Handle installation to UEFI with care and be prepared!
    For details see: https://md.archlinux.org/F1JuYj5xQtWyhvH8_ilErg#
 EOM
+  fi
 }
 
 post_install() {