diff --git a/config/p10k-classic.zsh b/config/p10k-classic.zsh
index b5df1e6f..f68ff457 100644
--- a/config/p10k-classic.zsh
+++ b/config/p10k-classic.zsh
@@ -13,8 +13,7 @@
 'builtin' 'setopt' 'no_aliases' 'no_sh_glob' 'brace_expand'
 
 () {
-  emulate -L zsh
-  setopt no_unset extended_glob
+  emulate -L zsh -o extended_glob
 
   # Unset all configuration options. This allows you to apply configiguration changes without
   # restarting zsh. Edit ~/.p10k.zsh and type `source ~/.p10k.zsh`.
@@ -23,8 +22,11 @@
   autoload -Uz is-at-least && is-at-least 5.1 || return
 
   zmodload zsh/langinfo
-  if [[ ${langinfo[CODESET]:-} != (utf|UTF)(-|)8 ]]; then
-    local LC_ALL=${${(@M)$(locale -a):#*.(utf|UTF)(-|)8}[1]:-en_US.UTF-8}
+  if [[ ${langinfo[CODESET]:-} != (utf|UTF)(-|)8 && $+commands[locale] == 1 ]]; then
+    local -a loc
+    if loc=(${(@M)$(locale -a 2>/dev/null):#*.(utf|UTF)(-|)8}) && (( $#loc )); then
+      local LC_ALL=${loc[(r)(#i)C.UTF(-|)8]:-${loc[(r)(#i)en_US.UTF(-|)8]:-$loc[1]}}
+    fi
   fi
 
   # The list of segments shown on the left. Fill it with the most important segments.
diff --git a/config/p10k-lean-8colors.zsh b/config/p10k-lean-8colors.zsh
index 40a02060..e53f57e7 100644
--- a/config/p10k-lean-8colors.zsh
+++ b/config/p10k-lean-8colors.zsh
@@ -13,8 +13,7 @@
 'builtin' 'setopt' 'no_aliases' 'no_sh_glob' 'brace_expand'
 
 () {
-  emulate -L zsh
-  setopt no_unset extended_glob
+  emulate -L zsh -o extended_glob
 
   # Unset all configuration options. This allows you to apply configiguration changes without
   # restarting zsh. Edit ~/.p10k.zsh and type `source ~/.p10k.zsh`.
@@ -23,8 +22,11 @@
   autoload -Uz is-at-least && is-at-least 5.1 || return
 
   zmodload zsh/langinfo
-  if [[ ${langinfo[CODESET]:-} != (utf|UTF)(-|)8 ]]; then
-    local LC_ALL=${${(@M)$(locale -a):#*.(utf|UTF)(-|)8}[1]:-en_US.UTF-8}
+  if [[ ${langinfo[CODESET]:-} != (utf|UTF)(-|)8 && $+commands[locale] == 1 ]]; then
+    local -a loc
+    if loc=(${(@M)$(locale -a 2>/dev/null):#*.(utf|UTF)(-|)8}) && (( $#loc )); then
+      local LC_ALL=${loc[(r)(#i)C.UTF(-|)8]:-${loc[(r)(#i)en_US.UTF(-|)8]:-$loc[1]}}
+    fi
   fi
 
   # The list of segments shown on the left. Fill it with the most important segments.
diff --git a/config/p10k-lean.zsh b/config/p10k-lean.zsh
index 5c93a2cd..dab917ef 100644
--- a/config/p10k-lean.zsh
+++ b/config/p10k-lean.zsh
@@ -13,8 +13,7 @@
 'builtin' 'setopt' 'no_aliases' 'no_sh_glob' 'brace_expand'
 
 () {
-  emulate -L zsh
-  setopt no_unset extended_glob
+  emulate -L zsh -o extended_glob
 
   # Unset all configuration options. This allows you to apply configiguration changes without
   # restarting zsh. Edit ~/.p10k.zsh and type `source ~/.p10k.zsh`.
@@ -23,8 +22,11 @@
   autoload -Uz is-at-least && is-at-least 5.1 || return
 
   zmodload zsh/langinfo
-  if [[ ${langinfo[CODESET]:-} != (utf|UTF)(-|)8 ]]; then
-    local LC_ALL=${${(@M)$(locale -a):#*.(utf|UTF)(-|)8}[1]:-en_US.UTF-8}
+  if [[ ${langinfo[CODESET]:-} != (utf|UTF)(-|)8 && $+commands[locale] == 1 ]]; then
+    local -a loc
+    if loc=(${(@M)$(locale -a 2>/dev/null):#*.(utf|UTF)(-|)8}) && (( $#loc )); then
+      local LC_ALL=${loc[(r)(#i)C.UTF(-|)8]:-${loc[(r)(#i)en_US.UTF(-|)8]:-$loc[1]}}
+    fi
   fi
 
   # The list of segments shown on the left. Fill it with the most important segments.
diff --git a/config/p10k-pure.zsh b/config/p10k-pure.zsh
index fcae29fc..b2e8dd2f 100644
--- a/config/p10k-pure.zsh
+++ b/config/p10k-pure.zsh
@@ -24,7 +24,6 @@
 
 () {
   emulate -L zsh
-  setopt no_unset
 
   autoload -Uz is-at-least && is-at-least 5.1 || return
 
diff --git a/config/p10k-rainbow.zsh b/config/p10k-rainbow.zsh
index c7cae983..9948b574 100644
--- a/config/p10k-rainbow.zsh
+++ b/config/p10k-rainbow.zsh
@@ -13,8 +13,7 @@
 'builtin' 'setopt' 'no_aliases' 'no_sh_glob' 'brace_expand'
 
 () {
-  emulate -L zsh
-  setopt no_unset extended_glob
+  emulate -L zsh -o extended_glob
 
   # Unset all configuration options. This allows you to apply configiguration changes without
   # restarting zsh. Edit ~/.p10k.zsh and type `source ~/.p10k.zsh`.
@@ -23,8 +22,11 @@
   autoload -Uz is-at-least && is-at-least 5.1 || return
 
   zmodload zsh/langinfo
-  if [[ ${langinfo[CODESET]:-} != (utf|UTF)(-|)8 ]]; then
-    local LC_ALL=${${(@M)$(locale -a):#*.(utf|UTF)(-|)8}[1]:-en_US.UTF-8}
+  if [[ ${langinfo[CODESET]:-} != (utf|UTF)(-|)8 && $+commands[locale] == 1 ]]; then
+    local -a loc
+    if loc=(${(@M)$(locale -a 2>/dev/null):#*.(utf|UTF)(-|)8}) && (( $#loc )); then
+      local LC_ALL=${loc[(r)(#i)C.UTF(-|)8]:-${loc[(r)(#i)en_US.UTF(-|)8]:-$loc[1]}}
+    fi
   fi
 
   # The list of segments shown on the left. Fill it with the most important segments.