diff --git a/Makefile.inc1 b/Makefile.inc1
index 5102f9d0ec3f..f56fc71ddcf5 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1230,7 +1230,7 @@ reinstallkernel reinstallkernel.debug: _installcheck_kernel
 	    ${CROSSENV} PATH=${TMPPATH} \
 	    ${MAKE} ${IMAKE_INSTALL} KERNEL=${INSTKERNNAME} ${.TARGET:S/kernel//}
 .endif
-.if ${BUILDKERNELS:[#]} > 1
+.if ${BUILDKERNELS:[#]} > 1 && !defined(NO_INSTALLEXTRAKERNELS)
 .for _kernel in ${BUILDKERNELS:[2..-1]}
 	@echo "--------------------------------------------------------------"
 	@echo ">>> Installing kernel ${_kernel}"
@@ -1261,7 +1261,7 @@ distributekernel distributekernel.debug:
 	    ${DESTDIR}/${DISTDIR}/kernel.meta
 .endif
 .endif
-.if ${BUILDKERNELS:[#]} > 1
+.if ${BUILDKERNELS:[#]} > 1 && !defined(NO_INSTALLEXTRAKERNELS)
 .for _kernel in ${BUILDKERNELS:[2..-1]}
 .if defined(NO_ROOT)
 	echo "#${MTREE_MAGIC}" > ${DESTDIR}/${DISTDIR}/kernel.${_kernel}.premeta
@@ -1292,7 +1292,7 @@ packagekernel:
 	    tar cvf - --include '*/*/*.debug' \
 	    @${DESTDIR}/${DISTDIR}/kernel.meta | \
 	    ${XZ_CMD} > ${DESTDIR}/${DISTDIR}/kernel-dbg.txz
-.if ${BUILDKERNELS:[#]} > 1
+.if ${BUILDKERNELS:[#]} > 1 && !defined(NO_INSTALLEXTRAKERNELS)
 .for _kernel in ${BUILDKERNELS:[2..-1]}
 	cd ${DESTDIR}/${DISTDIR}/kernel.${_kernel}; \
 	    tar cvf - --exclude '*.debug' \
@@ -1313,7 +1313,7 @@ packagekernel:
 	cd ${DESTDIR}/${DISTDIR}/kernel; \
 	    tar cvf - --include '*/*/*.debug' $$(eval find .) | \
 	    ${XZ_CMD} > ${DESTDIR}/${DISTDIR}/kernel-dbg.txz
-.if ${BUILDKERNELS:[#]} > 1
+.if ${BUILDKERNELS:[#]} > 1 && !defined(NO_INSTALLEXTRAKERNELS)
 .for _kernel in ${BUILDKERNELS:[2..-1]}
 	cd ${DESTDIR}/${DISTDIR}/kernel.${_kernel}; \
 	    tar cvf - --exclude '*.debug' . | \