--- a/INSTALL	Thu Jul 02 09:25:49 2015 +0200
+++ b/INSTALL	Thu Jul 02 09:45:36 2015 +0200
@@ -32,12 +32,21 @@
 To build Orthanc, you must:
 
 1) Download the source code (either using Mercurial, or through the
-   released versions). For the examples below, we assume the source
+   official releases). For the examples below, we assume the source
    directory is "~/Orthanc".
 
 2) Create a build directory. For the examples below, we assume the
    build directory is "~/OrthancBuild".
 
+3) Depending on your platform, follow the build instructions below.
+
+
+WARNING: If you do not create a fresh "~/OrthancBuild" directory after
+upgrading the source code (i.e. if you reuse the build directory that
+was used to build a different version of Orthanc), the build might
+fail because of changes in the compilation/linking flags. Always
+prefer to force a re-build in a new directory.
+
 
 
 Native Linux Compilation