diff --git a/README.md b/README.md
index 36bc658..418db80 100644
--- a/README.md
+++ b/README.md
@@ -34,10 +34,18 @@ Copy your *Operator Mono* OpenType files into the `original` folder.
 
 From the command line, run:
 
+### Windows
+
 ```
 build
 ```
 
+### Linux/Mac
+
+```
+build.sh
+```
+
 This will generate the new font files in the `build` folder. You can now install these fonts on your system.
 
 ---
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..06fcc93
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+rm original/*.ttx
+ttx original/OperatorMono-Medium.otf
+ttx original/OperatorMono-MediumItalic.otf
+
+mkdir -p build
+
+node index.js OperatorMono-Medium
+node index.js OperatorMono-MediumItalic
+
+rm -rf build/*.otf
+
+ttx build/OperatorMonoLig-Medium.ttx
+ttx build/OperatorMonoLig-MediumItalic.ttx