diff --git a/init.el b/init.el
index 9611c50..d92b0ad 100644
--- a/init.el
+++ b/init.el
@@ -786,7 +786,7 @@
          ("M-*" . tempel-insert))
   :hook ((conf-mode prog-mode text-mode) . (lambda () (add-hook 'completion-at-point-functions 'tempel-complete nil t)))
   :custom
-  (tempel-trigger-prefix "<"))
+  (tempel-trigger-prefix "+"))
 
 (require 'tramp)
 (setq org-publish-project-alist
diff --git a/templates b/templates
index 683498d..7796077 100644
--- a/templates
+++ b/templates
@@ -203,6 +203,13 @@ python-base-mode
 (logg "logger = logging.getLogger(__name__)")
 (nimp "raise NotImplementedError")
 
+envrc-file-mode
+
+(python "CC=\"$(nix build nixpkgs#stdenv.cc.cc.lib --print-out-paths --no-link)\"" n
+        "ZLIB=\"$(nix build nixpkgs#zlib --print-out-paths --no-link)\"" n
+        "export LD_LIBRARY_PATH=\"$CC/lib\":\"$ZLIB/lib\"" n
+        "source .venv/bin/activate")
+
 ;; Local Variables:
 ;; mode: lisp-data
 ;; outline-regexp: "[a-z]"