diff --git a/README.md b/README.md
index 5938aab049..3ed96728b7 100644
--- a/README.md
+++ b/README.md
@@ -50,12 +50,11 @@ Installation
 ------------
 
 This software depends on [NumPy], a Python package for
-scientific computing. You must have it installed prior to installing
-gensim.
-
-It is also recommended you install a fast BLAS library before installing
-NumPy. This is optional, but using an optimized BLAS such as MKL, [ATLAS] or
-[OpenBLAS] is known to improve performance by as much as an order of
+scientific computing. Please bear in mind that building NumPy from source
+(e.g. by installing gensim on a platform which lacks NumPy .whl distribution)
+is a non-trivial task involving linking NumPy to a BLAS library.  
+It is recommended to provide a fast one (such as MKL, [ATLAS] or
+[OpenBLAS]) which can improve performance by as much as an order of
 magnitude. On OSX, NumPy picks up its vecLib BLAS automatically,
 so you don’t need to do anything special.