diff --git a/README.md b/README.md
index b51da3b..a0d6bd7 100644
--- a/README.md
+++ b/README.md
@@ -25,15 +25,23 @@ valid signature for a CAB file containing Java files. It supports getting
 the timestamp through a proxy as well. It also supports signature verification,
 removal and extraction.
 
-## INSTALLATION
+## BUILDING
 
-The usual way:
+This build technique works on Linux and macOS, if you have the necessary tools installed:
 ```
+  ./autogen.sh
   ./configure
   make
   make install
 ```
 
+* On Linux, (tested on Debian/Ubuntu) you may need `sudo apt-get update && sudo apt-get install build-essential autoconf libtool libssl-dev python3-pkgconfig libcurl4-gnutls-dev`
+* On macOS with Homebrew, you probably need to do these things before autogen.sh and configure:
+```
+  brew install openssl@1.1 automake pkg-config libtool
+  export PKG_CONFIG_PATH="/usr/local/opt/openssl@1.1/lib/pkgconfig"
+```
+
 ## USAGE
 
 Before you can sign a file you need a Software Publishing