diff --git a/README.md b/README.md
index ded7195..1ca94f8 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,21 @@
 # utoy
+
+## Building the executable
+
+```
+$ $(nix-build utoy.nix)/bin/utoy
+```
+
+## Building the Docker image
+
+```
+$ docker load < $(nix-build nix/docker-image.nix)
+```
+
+## Development Shell
+
+Includes Stack, `haskell-language-server`, `gen-hie` etc.
+
+```
+$ nix-shell
+```