add note that the nightly rust compiler is required

1 files changed, 1 insertions, 0 deletions

diff --git a/README.md b/README.md
index af181e2..291f0dd 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ This is a shell written in Rust.
 
 ## Building it
 - Have rust/cargo installed
+- `rustup override set nightly`
 - `cargo build`
 
 ## Trying it out