diff --git a/.config/guix/cobra/home.scm b/.config/guix/cobra/home.scm
index 07e785c..3c6111c 100644
--- a/.config/guix/cobra/home.scm
+++ b/.config/guix/cobra/home.scm
@@ -174,7 +174,7 @@ __ssh() {
 }
 
 __guix_env() {
-        local re='[\\(]?\\(\"([^\"]*)\"'
+        local re='[\\(]?\\(\"([a-z]*)\"$'
         if [[ \"$GUIX_ENVIRONMENT\" ]]; then
                 local PACKAGES=($(while read -r line; do
                                 [[ \"$line\" =~ $re ]] && printf '%s ' \"${BASH_REMATCH[1]}\"
diff --git a/.prompt b/.prompt
index 5b58a17..ccf4f13 100644
--- a/.prompt
+++ b/.prompt
@@ -114,7 +114,7 @@ __ssh() {
 }
 
 __guix_env() {
-        local re='[\(]?\("([^"]*)"'
+        local re='[\(]?\("([a-z]*)"$'
         if [[ "$GUIX_ENVIRONMENT" ]]; then
                 local PACKAGES=($(while read -r line; do
                                 [[ "$line" =~ $re ]] && printf '%s ' "${BASH_REMATCH[1]}"