--- ./lib/psm.c.orig	2016-04-21 13:22:27.901033751 +0000
+++ ./lib/psm.c	2016-04-21 13:23:45.324742853 +0000
@@ -285,7 +285,9 @@ static rpmRC runScript(rpmts ts, rpmte t
     int warn_only = (stag != RPMTAG_PREIN &&
 		     stag != RPMTAG_PREUN &&
 		     stag != RPMTAG_PRETRANS &&
-		     stag != RPMTAG_VERIFYSCRIPT);
+		     stag != RPMTAG_VERIFYSCRIPT &&
+		     !(stag == RPMTAG_POSTIN &&
+			rpmExpandNumeric("%{_fail_on_postinstall_errors}")));
 
     sfd = rpmtsNotify(ts, te, RPMCALLBACK_SCRIPT_START, stag, 0);
     if (sfd == NULL)
--- ./macros.in.orig	2016-04-21 13:21:58.933142657 +0000
+++ ./macros.in	2016-04-21 13:22:27.902033748 +0000
@@ -1327,6 +1327,11 @@ end}
 %{-S:%{expand:%__scm_setup_%{-S*} %{!-v:-q}}}\
 %{!-N:%autopatch %{-v} %{-p:-p%{-p*}}}
 
+# Should errors in %post scriptlet be propagated as errors? 
+#
+# Note: set to 1 for legacy compatibility.
+%_fail_on_postinstall_errors  0
+
 # \endverbatim
 #*/