diff --git a/ghc-bootstrap.changes b/ghc-bootstrap.changes
index 061d7b8..e7e0088 100644
--- a/ghc-bootstrap.changes
+++ b/ghc-bootstrap.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Sep 16 10:59:21 UTC 2014 - peter.trommler@ohm-hochschule.de
+
+- add conflicts tags for ghc-*-devel packages provided by
+  package ghc 
+
 -------------------------------------------------------------------
 Mon Sep 15 16:54:51 UTC 2014 - peter.trommler@ohm-hochschule.de
 
diff --git a/ghc-bootstrap.spec b/ghc-bootstrap.spec
index af69fd7..4e22a59 100644
--- a/ghc-bootstrap.spec
+++ b/ghc-bootstrap.spec
@@ -63,6 +63,7 @@ Provides:       ghc-old-time
 Provides:       ghc-process
 Provides:       ghc-time
 Provides:       ghc-unix
+
 #devel packages
 Provides:       ghc-array-devel
 Provides:       ghc-base-devel
@@ -80,6 +81,29 @@ Provides:       ghc-process-devel
 Provides:       ghc-time-devel
 Provides:       ghc-unix-devel
 
+Conflicts:      ghc-compiler
+Conflicts:      ghc-Cabal-devel
+Conflicts:      ghc-array-devel
+Conflicts:      ghc-base-devel
+Conflicts:      ghc-binary-devel
+Conflicts:      ghc-bytestring-devel
+Conflicts:      ghc-containers-devel
+Conflicts:      ghc-deepseq-devel
+Conflicts:      ghc-directory-devel
+Conflicts:      ghc-filepath-devel
+Conflicts:      ghc-ghc-devel
+Conflicts:      ghc-haskell2010-devel
+Conflicts:      ghc-haskell98-devel
+Conflicts:      ghc-hoopl-devel
+Conflicts:      ghc-hpc-devel
+Conflicts:      ghc-old-locale-devel
+Conflicts:      ghc-old-time-devel
+Conflicts:      ghc-pretty-devel
+Conflicts:      ghc-process-devel
+Conflicts:      ghc-template-haskell-devel
+Conflicts:      ghc-time-devel
+Conflicts:      ghc-unix-devel
+
 AutoReq:        off
 
 %description