diff --git a/README.md b/README.md
index 48337a6..29d9df5 100644
--- a/README.md
+++ b/README.md
@@ -144,6 +144,9 @@ first:
 
 ```sh
 pacman -Sy --ignore sudo base-devel
+:: sudo is in IgnorePkg/IgnoreGroup. Install anyway? [Y/n] n
+...
+...
 ```
 
 JuNest uses a modified version of `sudo`. That's why the original `sudo`
diff --git a/lib/core/namespace.sh b/lib/core/namespace.sh
index 45c7c09..c80b80d 100644
--- a/lib/core/namespace.sh
+++ b/lib/core/namespace.sh
@@ -10,6 +10,7 @@
 #
 # vim: ft=sh
 
+COMMON_BWRAP_OPTION="--bind "$JUNEST_HOME" / --bind "$HOME" "$HOME" --bind /tmp /tmp --bind /sys /sys --bind /proc /proc --dev-bind-try /dev /dev --unshare-user-try"
 CONFIG_PROC_FILE="/proc/config.gz"
 CONFIG_BOOT_FILE="/boot/config-$($UNAME -r)"
 PROC_USERNS_CLONE_FILE="/proc/sys/kernel/unprivileged_userns_clone"
@@ -94,7 +95,7 @@ function run_env_as_bwrap_fakeroot(){
     local args=()
     [[ "$1" != "" ]] && args=("-c" "$(insert_quotes_on_spaces "${@}")")
 
-    JUNEST_ENV=1 "$backend_command" --bind "$JUNEST_HOME" / --bind "$HOME" "$HOME" --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --uid 0 --gid 0 $backend_args sudo "${DEFAULT_SH[@]}" "${args[@]}"
+    JUNEST_ENV=1 "$backend_command" $COMMON_BWRAP_OPTION --uid 0 --gid 0 $backend_args sudo "${DEFAULT_SH[@]}" "${args[@]}"
 }
 
 
@@ -141,7 +142,7 @@ function run_env_as_bwrap_user() {
     local args=()
     [[ "$1" != "" ]] && args=("-c" "$(insert_quotes_on_spaces "${@}")")
 
-    JUNEST_ENV=1 "$backend_command" --bind "$JUNEST_HOME" / --bind "$HOME" "$HOME" --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try $backend_args "${DEFAULT_SH[@]}" "${args[@]}"
+    JUNEST_ENV=1 "$backend_command" $COMMON_BWRAP_OPTION $backend_args "${DEFAULT_SH[@]}" "${args[@]}"
 }
 
 
diff --git a/tests/unit-tests/test-namespace.sh b/tests/unit-tests/test-namespace.sh
index e24311f..d2cafd9 100755
--- a/tests/unit-tests/test-namespace.sh
+++ b/tests/unit-tests/test-namespace.sh
@@ -104,21 +104,21 @@ function test_is_user_namespace_enabled_with_userns_clone_file_enabled(){
 
 function test_run_env_as_bwrap_fakeroot() {
     assertCommandSuccess run_env_as_bwrap_fakeroot "" "" "false"
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --uid 0 --gid 0 sudo /bin/sh --login" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION --uid 0 --gid 0 sudo /bin/sh --login" "$(cat $STDOUTF)"
 
     _test_copy_common_files
 }
 
 function test_run_env_as_bwrap_fakeroot_with_backend_command() {
     assertCommandSuccess run_env_as_bwrap_fakeroot "mybwrap" "" "false"
-    assertEquals "mybwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --uid 0 --gid 0 sudo /bin/sh --login" "$(cat $STDOUTF)"
+    assertEquals "mybwrap $COMMON_BWRAP_OPTION --uid 0 --gid 0 sudo /bin/sh --login" "$(cat $STDOUTF)"
 
     _test_copy_common_files
 }
 
 function test_run_env_as_bwrap_user() {
     assertCommandSuccess run_env_as_bwrap_user "" "" "false"
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try /bin/sh --login" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION /bin/sh --login" "$(cat $STDOUTF)"
 
     _test_copy_common_files
     _test_copy_remaining_files
@@ -126,7 +126,7 @@ function test_run_env_as_bwrap_user() {
 
 function test_run_env_as_bwrap_user_with_backend_command() {
     assertCommandSuccess run_env_as_bwrap_user "mybwrap" "" "false"
-    assertEquals "mybwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try /bin/sh --login" "$(cat $STDOUTF)"
+    assertEquals "mybwrap $COMMON_BWRAP_OPTION /bin/sh --login" "$(cat $STDOUTF)"
 
     _test_copy_common_files
     _test_copy_remaining_files
@@ -134,7 +134,7 @@ function test_run_env_as_bwrap_user_with_backend_command() {
 
 function test_run_env_as_bwrap_fakeroot_no_copy() {
     assertCommandSuccess run_env_as_bwrap_fakeroot "" "" "true" ""
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --uid 0 --gid 0 sudo /bin/sh --login" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION --uid 0 --gid 0 sudo /bin/sh --login" "$(cat $STDOUTF)"
 
     [[ ! -e ${JUNEST_HOME}/etc/hosts ]]
     assertEquals 0 $?
@@ -160,7 +160,7 @@ function test_run_env_as_bwrap_fakeroot_no_copy() {
 
 function test_run_env_as_bwrap_user_no_copy() {
     assertCommandSuccess run_env_as_bwrap_user "" "" "true" ""
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try /bin/sh --login" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION /bin/sh --login" "$(cat $STDOUTF)"
 
     [[ ! -e ${JUNEST_HOME}/etc/hosts ]]
     assertEquals 0 $?
@@ -186,14 +186,14 @@ function test_run_env_as_bwrap_user_no_copy() {
 
 function test_run_env_as_bwrap_fakeroot_with_backend_args() {
     assertCommandSuccess run_env_as_bwrap_fakeroot "" "--bind /usr /usr" "false"
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --uid 0 --gid 0 --bind /usr /usr sudo /bin/sh --login" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION --uid 0 --gid 0 --bind /usr /usr sudo /bin/sh --login" "$(cat $STDOUTF)"
 
     _test_copy_common_files
 }
 
 function test_run_env_as_bwrap_user_with_backend_args() {
     assertCommandSuccess run_env_as_bwrap_user "" "--bind /usr /usr" "false"
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --bind /usr /usr /bin/sh --login" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION --bind /usr /usr /bin/sh --login" "$(cat $STDOUTF)"
 
     _test_copy_common_files
     _test_copy_remaining_files
@@ -201,14 +201,14 @@ function test_run_env_as_bwrap_user_with_backend_args() {
 
 function test_run_env_as_bwrap_fakeroot_with_command() {
     assertCommandSuccess run_env_as_bwrap_fakeroot "" "" "false" "ls -la"
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --uid 0 --gid 0 sudo /bin/sh --login -c \"ls -la\"" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION --uid 0 --gid 0 sudo /bin/sh --login -c \"ls -la\"" "$(cat $STDOUTF)"
 
     _test_copy_common_files
 }
 
 function test_run_env_as_bwrap_user_with_command() {
     assertCommandSuccess run_env_as_bwrap_user "" "" "false" "ls -la"
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try /bin/sh --login -c \"ls -la\"" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION /bin/sh --login -c \"ls -la\"" "$(cat $STDOUTF)"
 
     _test_copy_common_files
     _test_copy_remaining_files
@@ -216,14 +216,14 @@ function test_run_env_as_bwrap_user_with_command() {
 
 function test_run_env_as_bwrap_fakeroot_with_backend_args_and_command() {
     assertCommandSuccess run_env_as_bwrap_fakeroot "" "--bind /usr /usr" "false" "ls -la"
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --uid 0 --gid 0 --bind /usr /usr sudo /bin/sh --login -c \"ls -la\"" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION --uid 0 --gid 0 --bind /usr /usr sudo /bin/sh --login -c \"ls -la\"" "$(cat $STDOUTF)"
 
     _test_copy_common_files
 }
 
 function test_run_env_as_bwrap_user_with_backend_args_and_command() {
     assertCommandSuccess run_env_as_bwrap_user "" "--bind /usr /usr" "false" "ls -la"
-    assertEquals "bwrap --bind $JUNEST_HOME / --bind $HOME $HOME --bind /tmp /tmp --proc /proc --dev /dev --unshare-user-try --bind /usr /usr /bin/sh --login -c \"ls -la\"" "$(cat $STDOUTF)"
+    assertEquals "bwrap $COMMON_BWRAP_OPTION --bind /usr /usr /bin/sh --login -c \"ls -la\"" "$(cat $STDOUTF)"
 
     _test_copy_common_files
     _test_copy_remaining_files