Try enabling eglot lsp for nix

init.el

@@ -93,7 +93,7 @@
        (eval +overlay)     ; run code, run (also, repls)
        ;;gist              ; interacting with github gists
        lookup              ; navigate your code and its documentation
-       ;;lsp
+       (lsp +eglot)
        magit             ; a git porcelain for Emacs
        make                ; run make tasks from Emacs
        ;;pass              ; password manager for nerds
@@ -113,7 +113,7 @@
        :lang
        ;;agda              ; types of types of types of types...
        cc                ; C/C++/Obj-C madness
-       clojure           ; java with a lisp
+       (clojure +lsp)    ; java with a lisp
        common-lisp       ; if you've seen one lisp, you've seen them all
        ;;coq               ; proofs-as-programs
        ;;crystal           ; ruby at the speed of c

packages.el

@@ -46,6 +46,11 @@ Usage: (advice-add 'my-function-for-advisement :around 'tls-nocheck-error-advice
   :config
   (advice-add 'elpher-get-gemini-response :around 'tls-nocheck-error-advice))
 
+(when (and (package! eglot) (package! nix-mode))
+  (use-package eglot
+    :config (add-to-list 'eglot-server-programs '(nix-mode . ("nil")))
+    :hook   (nix-mode . eglot-ensure)))
+
 ;; To install a package directly from a remote git repo, you must specify a
 ;; `:recipe'. You'll find documentation on what `:recipe' accepts here:
 ;; https://github.com/raxod502/straight.el#the-recipe-format