diff --git a/README.md b/README.md
index 159f180..26bc0b4 100644
--- a/README.md
+++ b/README.md
@@ -65,14 +65,17 @@ To build an ISO image that you can boot, there are several prerequisites:
 
 Then run `make` to invoke the [Makefile](Makefile).
 
+- `make checkenv`: Asserts all needed commands and resources are accessible.
 - `make prepare`: Installs needed Rust toolchain.
-- `make clean`: Cleans all built files.
+- `make clean`: Cleans all built binaries, libraries, and ISOs.
 - `make gila`: Builds the kernel ELF file.
 - `make iso`: Builds the bootable ISO with Limine installed.
 - `make run`: Builds the ISO and boots it in QEMU.
 
 By supplying `TARGET=(rustc target triple)` as an additional argument, you can change the architecture that gila will be compiled & run for. The default is `x86_64-unknown-none`.
 
+The default limine BIOS file search directory is `/usr/share/limine`. You can change this by supplying a path (no trailing slash) like so: `LIMINE-DIR=/home/user/Downloads/limine`.
+
 You can install all these dependencies automatically by using `nix-shell` and
 supplying [shell.nix](shell.nix) as an argument.