diff --git a/docs/install.rst b/docs/install.rst
index a1b812f4..b949a8d0 100644
--- a/docs/install.rst
+++ b/docs/install.rst
@@ -129,11 +129,27 @@ Create the tarball and the spec file:
    make dist
    cp mckernel-<version>.tar.gz <rpmbuild>/SOURCES
 
+(optional) Insert a line into ``scripts/mckernel.spec`` to specify
+cmake options. For example:
+
+::
+
+   %cmake -DCMAKE_BUILD_TYPE=Release \
+	-DUNAME_R=%{kernel_version} \
+	-DKERNEL_DIR=%{kernel_dir} \
+	%{?cmake_libdir:-DCMAKE_INSTALL_LIBDIR=%{cmake_libdir}} \
+	%{?build_target:-DBUILD_TARGET=%{build_target}} \
+	%{?toolchain_file:-DCMAKE_TOOLCHAIN_FILE=%{toolchain_file}} \
+	-DENABLE_TOFU=ON -DENABLE_FUGAKU_HACKS=ON -DENABLE_KRM_WORKAROUND=OFF -DWITH_KRM=ON -DENABLE_FUGAKU_DEBUG=OFF \
+	.
+
 Create the rpm package:
 
 When not cross-compiling:
 """""""""""""""""""""""""
 
+Then build the rpm:
+
 ::
 
    rpmbuild -ba scripts/mckernel.spec