change container PS1 check with that from distrobox

This is the check distrobox uses for seeing if we're in a
container. See https://github.com/89luca89/distrobox/blob/324f6fedac818dd71eefbde3ee34d709477c9064/distrobox-init#L2252

1 files changed, 2 insertions, 2 deletions

diff --git a/dot-bashrc b/dot-bashrc
index 43ed001..e6792c4 100644
--- a/dot-bashrc
+++ b/dot-bashrc
@@ -92,8 +92,8 @@ eval "$(direnv hook bash)"
 # zoxide
 eval "$(zoxide init bash)"
 
-# add container id to prompt when in a container
-if [[ -n "$CONTAINER_ID" ]]; then
+# add container id to prompt when in a toolbox/distrobox container
+if [ -f /run/.toolboxenv ]; then
   PS1="($CONTAINER_ID) $PS1"
 fi