diff --git a/dot_config/nixpkgs/config.nix b/dot_config/nixpkgs/config.nix
index e68dc90..69c444a 100644
--- a/dot_config/nixpkgs/config.nix
+++ b/dot_config/nixpkgs/config.nix
@@ -1,3 +1,4 @@
+# https://nixos.org/manual/nixpkgs/stable/#sec-declarative-package-management
 {
   packageOverrides = pkgs: with pkgs; {
     myPackages = pkgs.buildEnv {
diff --git a/dot_zshrc.tmpl b/dot_zshrc.tmpl
index 7ffbe29..4ef7357 100644
--- a/dot_zshrc.tmpl
+++ b/dot_zshrc.tmpl
@@ -63,6 +63,10 @@ key[Control-Right]="${terminfo[kRIT5]}"
 [[ -n "${key[Control-Left]}"  ]] && bindkey -- "${key[Control-Left]}"  backward-word
 [[ -n "${key[Control-Right]}" ]] && bindkey -- "${key[Control-Right]}" forward-word
 
+# nix config (load nix first to get available pkgs in PATH)
+if [ -e $HOME/.nix-profile/etc/profile.d/nix.sh ]; then
+	. $HOME/.nix-profile/etc/profile.d/nix.sh;
+fi
 
 # custom PATH
 path+=("$HOME"'/.local/bin')
@@ -156,12 +160,11 @@ if command -v pyenv &> /dev/null; then
 	eval "$(pyenv init -)"
 fi
 
-# nix config
-if [ -e $HOME/.nix-profile/etc/profile.d/nix.sh ]; then
-	. $HOME/.nix-profile/etc/profile.d/nix.sh;
+# direnv
+if command -v direnv &> /dev/null; then
+	eval "$(direnv hook zsh)"
 fi
 
-
 # editors
 export EDITOR="nvim"
 export VISUAL="code"