diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index 255ba2793..59767a4d0 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -307,7 +307,8 @@ BootstrapArchCommon() {
     pkg-config
   "
 
-  missing=$($SUDO pacman -T $deps)
+  # pacman -T exits with 127 if there are missing dependencies
+  missing=$($SUDO pacman -T $deps) || true
 
   if [ "$missing" ]; then
     $SUDO pacman -S --needed $missing
diff --git a/letsencrypt-auto-source/pieces/bootstrappers/arch_common.sh b/letsencrypt-auto-source/pieces/bootstrappers/arch_common.sh
index 2e11e0ae9..b2fc01a14 100755
--- a/letsencrypt-auto-source/pieces/bootstrappers/arch_common.sh
+++ b/letsencrypt-auto-source/pieces/bootstrappers/arch_common.sh
@@ -18,7 +18,8 @@ BootstrapArchCommon() {
     pkg-config
   "
 
-  missing=$($SUDO pacman -T $deps)
+  # pacman -T exits with 127 if there are missing dependencies
+  missing=$($SUDO pacman -T $deps) || true
 
   if [ "$missing" ]; then
     $SUDO pacman -S --needed $missing