diff --git a/build.spec b/build.spec
index 5b1a273..92e041b 100644
--- a/build.spec
+++ b/build.spec
@@ -24,7 +24,6 @@ Version:        20121123
 Release:        0
 #!BuildIgnore:  build-mkbaselibs
 Source:         obs-build-%{version}.tar.gz
-Patch0:         master.diff
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildArch:      noarch
 # Manual requires to avoid hard require to bash-static
@@ -88,7 +87,6 @@ for generating delta rpm packages.
 
 %prep
 %setup -q -n obs-build-%version
-%patch0 -p1
 
 %build
 
diff --git a/master.diff b/master.diff
deleted file mode 100644
index 1819667..0000000
--- a/master.diff
+++ /dev/null
@@ -1,25 +0,0 @@
-From 7d1bfa52e9d2ffd60019481c1e3b96aa06d625ff Mon Sep 17 00:00:00 2001
-From: Andreas Jaeger <aj@suse.de>
-Date: Thu, 4 Oct 2012 11:13:13 +0200
-Subject: [PATCH] Mount /proc for rpmlint checks
-
-Otherwise rpm which is run in chroot will warn about missing /proc
-
-diff --git a/build b/build
-index 4ff7848..d88c094 100755
---- a/build
-+++ b/build
-@@ -2299,11 +2299,13 @@ if test -n "$RPMS" -a "$DO_CHECKS" != "false" -a -x "$BUILD_ROOT/opt/testing/bin
-     rpmlint_logfile=$TOPDIR/OTHER/rpmlint.log
-     rm -f "$BUILD_ROOT$rpmlint_logfile"
-     ret=0
-+    mount -n -tproc none $BUILD_ROOT/proc 2> /dev/null
-     chroot $BUILD_ROOT su -s /opt/testing/bin/rpmlint "$BUILD_USER" -- \
- 	    --info ${LINT_RPM_FILE_LIST[*]#$BUILD_ROOT} \
- 	    ${SRPM_FILE_LIST[*]#$BUILD_ROOT} > "$BUILD_ROOT$rpmlint_logfile" || ret=1
- 	    cat "$BUILD_ROOT$rpmlint_logfile"
- 	    echo
-+    umount -n $BUILD_ROOT/proc 2>/dev/null || true
-     if test "$ret" = 1; then
- 	cleanup_and_exit 1
-     fi