diff --git a/.zsh/pyenv.zsh b/.zsh/pyenv.zsh
index 37edfe4..6c44bd4 100644
--- a/.zsh/pyenv.zsh
+++ b/.zsh/pyenv.zsh
@@ -1,3 +1,6 @@
-export PYENV_ROOT="$HOME/.pyenv"
-command -v pyenv >/dev/null || export PATH="$PYENV_ROOT/bin:$PATH"
-eval "$(pyenv init -)"
+if iscmd pyenv; then
+	export PYENV_ROOT="$HOME/.pyenv"
+	command -v pyenv >/dev/null || export PATH="$PYENV_ROOT/bin:$PATH"
+	eval "$(pyenv init -)"
+fi
+
diff --git a/.zsh/rtx.zsh b/.zsh/rtx.zsh
index 8a72831..b5dd116 100644
--- a/.zsh/rtx.zsh
+++ b/.zsh/rtx.zsh
@@ -1,5 +1,7 @@
 export RTX_SHELL=zsh
 
+if iscmd rtx; then
+
 rtx() {
   local command
   command="${1:-}"
@@ -32,3 +34,4 @@ typeset -ag chpwd_functions;
 if [[ -z "${chpwd_functions[(r)_rtx_hook]+1}" ]]; then
   chpwd_functions=( _rtx_hook ${chpwd_functions[@]} )
 fi
+fi