1 files changed, 3 insertions, 2 deletions

diff --git a/README.md b/README.md
index b45f1bc..d676bf2 100644
--- a/README.md
+++ b/README.md
@@ -33,8 +33,9 @@ In nix shell (`nix develop`), run:
 
 ## Show library
 
-    BOOK_LIBRARY=path-to-books python src/main.py library
+    make
+    BOOKS_LIBRARY=path-to-books BOOKS_BROWSER=firefox python src/main.py library
 
 ## Add book
 
-    BOOK_LIBRARY=path-to-books python src/main.py new optional-path-to-ebook
+    BOOKS_LIBRARY=path-to-books python src/main.py new optional-path-to-ebook