diff --git a/README.org b/README.org
index 7257052..41c9f3a 100644
--- a/README.org
+++ b/README.org
@@ -211,7 +211,6 @@ mkShell {
   buildInputs = [
     go
     gopls
-    protoc-gen-go-grpc
   ];
   shellHook = ''
     export GO111MODULE=on
@@ -331,11 +330,11 @@ Import this shell with ~nix-shell /etc/dotfiles/shells/python.nix~
 with pkgs;
 mkShell {
   buildInputs = [
-    python39Packages.pip
-    python39Packages.pip-tools
-    python39Packages.pyls-mypy
-    python39Packages.pyls-isort
-    python39Packages.pyls-black
+    python38Packages.pip
+    python38Packages.pip-tools
+    python38Packages.pyls-mypy
+    python38Packages.pyls-isort
+    python38Packages.pyls-black
   ];
   shellHook = ''
   '';
@@ -2326,6 +2325,29 @@ The Language Server Protocol (LSP)[fn:70] defines the protocol used between an E
       lsp-ui-doc-delay 0.5)
 #+END_SRC
 
+** CCLS
+
+#+NAME: emacs-ccls-package
+#+BEGIN_SRC nix
+epkgs.ccls
+#+END_SRC
+
+Emacs CCLS[fn:: https://github.com/MaskRay/emacs-ccls] is a client for CCLS, a C/C++/Objective-C language server supporting multi-million line C++ code bases, powered by libclang.
+
+#+NAME: emacs-ccls-elisp
+#+BEGIN_SRC emacs-lisp
+;; Configure `ccls' to work with `lsp-mode'.
+(defun dotfiles/ccls-hook ()
+  (require 'ccls)
+  (lsp))
+
+;; Configure `ccls' mode hooks.
+(add-hook 'c-mode-hook 'dotfiles/ccls-hook)
+(add-hook 'c++-mode-hook 'dotfiles/ccls-hook)
+(add-hook 'objc-mode-hook 'dotfiles/ccls-hook)
+(add-hook 'cuda-mode-hook 'dotfiles/ccls-hook)
+#+END_SRC
+
 ** Company Mode
 
 #+NAME: emacs-company-package
diff --git a/shells/go.nix b/shells/go.nix
index e69b8ca..fce3d44 100644
--- a/shells/go.nix
+++ b/shells/go.nix
@@ -6,7 +6,6 @@ mkShell {
   buildInputs = [
     go
     gopls
-    protoc-gen-go-grpc
   ];
   shellHook = ''
     export GO111MODULE=on