Set luatex as default TeX-Engine

init.el

@@ -807,6 +807,8 @@
 
 (setq org-latex-compiler "lualatex")
 (setq org-preview-latex-default-process 'dvisvgm)
+(if (package-installed-p 'engrave-faces)
+    (setopt org-latex-src-block-backend 'engraved))
 
 (use-package vertico
   :if (package-installed-p 'vertico)
@@ -1168,12 +1170,11 @@
   (doc-view-imenu-enabled t)
   (doc-view-scale-internally t))
 
-(if (package-installed-p 'engrave-faces)
-    (setopt org-latex-src-block-backend 'engraved))
-
 (use-package auctex
   :if (package-installed-p 'auctex)
-  :defer t)
+  :defer t
+  :custom
+  (TeX-Engine 'luatex))
 
 (use-package markdown-mode
   :if (package-installed-p 'markdown-mode)