diff --git a/flake.nix b/flake.nix
index 9be8751a..9398c1a9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,6 +34,7 @@
           clang_12
           lld_12
           cargo
+          cargo-insta
           rustc
           libffi
           libxml2