From 2dbbacccc2bf6d2673084c366f700277ad5928cf Mon Sep 17 00:00:00 2001
From: JHenneberg <Julian.Henneberg@gmail.com>
Date: Tue, 10 Mar 2020 09:43:15 +0100
Subject: [PATCH] fixes #154

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index ed29e2350..eff8e3eed 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,14 @@ git clone https://github.com/fortran-lang/stdlib
 cd stdlib
 ```
 
+### Requirements
+
+The preprocessor ```fypp``` (https://github.com/aradi/fypp) is needed because metaprogramming is used.
+It can be installed using the command line installer ```pip```.
+```sh
+pip install fypp
+```
+
 ### Build with CMake
 
 ```sh