diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index e7090914a..23a9d93f0 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -307,10 +307,11 @@ 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
+    $SUDO pacman -S --needed $missing
   fi
 }
 
@@ -327,19 +328,19 @@ BootstrapGentooCommon() {
 
   case "$PACKAGE_MANAGER" in
     (paludis)
-      "$SUDO" cave resolve --preserve-world --keep-targets if-possible $PACKAGES -x
+      $SUDO cave resolve --preserve-world --keep-targets if-possible $PACKAGES -x
       ;;
     (pkgcore)
-      "$SUDO" pmerge --noreplace --oneshot $PACKAGES
+      $SUDO pmerge --noreplace --oneshot $PACKAGES
       ;;
     (portage|*)
-      "$SUDO" emerge --noreplace --oneshot $PACKAGES
+      $SUDO emerge --noreplace --oneshot $PACKAGES
       ;;
   esac
 }
 
 BootstrapFreeBsd() {
-  "$SUDO" pkg install -Ay \
+  $SUDO pkg install -Ay \
     python \
     py27-virtualenv \
     augeas \
diff --git a/letsencrypt-auto-source/pieces/bootstrappers/arch_common.sh b/letsencrypt-auto-source/pieces/bootstrappers/arch_common.sh
index 90a9d43c4..b2fc01a14 100755
--- a/letsencrypt-auto-source/pieces/bootstrappers/arch_common.sh
+++ b/letsencrypt-auto-source/pieces/bootstrappers/arch_common.sh
@@ -18,9 +18,10 @@ 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
+    $SUDO pacman -S --needed $missing
   fi
 }
diff --git a/letsencrypt-auto-source/pieces/bootstrappers/free_bsd.sh b/letsencrypt-auto-source/pieces/bootstrappers/free_bsd.sh
index c9abd22eb..deb2e2115 100755
--- a/letsencrypt-auto-source/pieces/bootstrappers/free_bsd.sh
+++ b/letsencrypt-auto-source/pieces/bootstrappers/free_bsd.sh
@@ -1,5 +1,5 @@
 BootstrapFreeBsd() {
-  "$SUDO" pkg install -Ay \
+  $SUDO pkg install -Ay \
     python \
     py27-virtualenv \
     augeas \
diff --git a/letsencrypt-auto-source/pieces/bootstrappers/gentoo_common.sh b/letsencrypt-auto-source/pieces/bootstrappers/gentoo_common.sh
index 1d8211df4..580b69a0d 100755
--- a/letsencrypt-auto-source/pieces/bootstrappers/gentoo_common.sh
+++ b/letsencrypt-auto-source/pieces/bootstrappers/gentoo_common.sh
@@ -11,13 +11,13 @@ BootstrapGentooCommon() {
 
   case "$PACKAGE_MANAGER" in
     (paludis)
-      "$SUDO" cave resolve --preserve-world --keep-targets if-possible $PACKAGES -x
+      $SUDO cave resolve --preserve-world --keep-targets if-possible $PACKAGES -x
       ;;
     (pkgcore)
-      "$SUDO" pmerge --noreplace --oneshot $PACKAGES
+      $SUDO pmerge --noreplace --oneshot $PACKAGES
       ;;
     (portage|*)
-      "$SUDO" emerge --noreplace --oneshot $PACKAGES
+      $SUDO emerge --noreplace --oneshot $PACKAGES
       ;;
   esac
 }