diff --git a/nix/devshell.nix b/nix/devshell.nix
index d7562084..9e3de16c 100644
--- a/nix/devshell.nix
+++ b/nix/devshell.nix
@@ -20,6 +20,7 @@
         rust-analyzer
         rustc
         rustfmt
+        shellcheck
         # The two "prose lint (vale)" CI jobs run vale over docs/. `vale
         # sync` must run once before `vale docs` and writes styles to
         # $XDG_DATA_HOME, so point that at the repo like CI does: