diff --git a/rpm/redhat/zfs-kmod.spec.in b/rpm/redhat/zfs-kmod.spec.in
index 9c836786b..876c198c6 100644
--- a/rpm/redhat/zfs-kmod.spec.in
+++ b/rpm/redhat/zfs-kmod.spec.in
@@ -17,7 +17,7 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 # by generating a preamble text file which kmodtool can append to the spec file.
 %(/bin/echo -e "\
 Requires:       @PACKAGE@ = %{version}\n\
-Conflicts:      @PACKAGE@-dkms)
+Conflicts:      @PACKAGE@-dkms" > %{_sourcedir}/kmod-preamble)
 
 # LDFLAGS are not sanitized by arch/*/Makefile for these architectures.
 %ifarch ppc ppc64 ppc64le aarch64