diff --git a/README.md b/README.md
index 362a9fb..6a44e79 100644
--- a/README.md
+++ b/README.md
@@ -27,9 +27,11 @@ Will give 348.29.
 
 ### Manually
 
-First run `make` to build a program, and then `make install` to copy executable in `/usr/local/bin/`. Later, use `make uninstall` to delete it, or just delete `/usr/local/bin/kwh-cost`.
+Just run `make install` to build and copy executable in `/usr/local/bin/`, set a `PREFIX=` variable to change a default `/usr/local` path. Or just run `make` to only build an executable.
 
-A `LICENSE` file is also being copied to `/usr/local/share/licenses/kwh-cost/LICENSE`.
+Use `make uninstall` to delete it (don't forget about the `PREFIX=` variable if you previously set it), or just delete `${PREFIX}/bin/kwh-cost` by hand.
+
+A `LICENSE` file is also being copied to `${PREFIX}/share/licenses/kwh-cost/LICENSE`.
 
 ### For ArchLinux