Use `which` instead of running `rustc --version`

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 218b799..de65fc6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,6 +19,7 @@ regex = "1.10.3"
 serde_json = "1.0.114"
 serde = { version = "1.0.197", features = ["derive"] }
 toml = "0.8.10"
+which = "6.0.1"
 
 [[bin]]
 name = "rustlings"