Update installation instructions for virtual envs

diff --git a/INSTALL.txt b/INSTALL.txt
index 3b0a526da0942fb2dcf9dbac30c7ae3ea109a0a7..82d9073af0f9f81f615f06cc10dfc081414b96bd 100644 (file)
--- a/INSTALL.txt
+++ b/INSTALL.txt
@@ -13,6 +13,10 @@ Installation using pip:
 
     pip install --user m_lib
 
+    Virtual environments:
+
+    pip install user m_lib
+
     For Python 2.6 the command is easy_install.
 
 Installation from sources: