diff --git a/sys/conf/Makefile.alpha b/sys/conf/Makefile.alpha
index 0d6afd18cc44..3d14ccf164cb 100644
--- a/sys/conf/Makefile.alpha
+++ b/sys/conf/Makefile.alpha
@@ -292,6 +292,7 @@ kernel-install kernel-install.debug:
 	fi
 .if exists(${DESTDIR}${KODIR})
 .if exists(${DESTDIR}${KODIR}.old)
+	@-chflags -R noschg ${DESTDIR}${KODIR}.old
 	-rm -rf ${DESTDIR}${KODIR}.old
 .endif
 	mv ${DESTDIR}${KODIR} ${DESTDIR}${KODIR}.old
@@ -301,6 +302,7 @@ kernel-install kernel-install.debug:
 		${KERNEL_KO}${.TARGET:S/kernel-install//} ${DESTDIR}${KODIR}
 
 kernel-reinstall kernel-reinstall.debug:
+	@-chflags -R noschg ${DESTDIR}${KODIR}
 	install -c -m 555 -o root -g wheel \
 		${KERNEL_KO}${.TARGET:S/kernel-reinstall//} ${DESTDIR}${KODIR}
 
diff --git a/sys/conf/Makefile.i386 b/sys/conf/Makefile.i386
index 1d5e1dce0683..b329c11a3f22 100644
--- a/sys/conf/Makefile.i386
+++ b/sys/conf/Makefile.i386
@@ -252,6 +252,7 @@ kernel-install kernel-install.debug:
 	fi
 .if exists(${DESTDIR}${KODIR})
 .if exists(${DESTDIR}${KODIR}.old)
+	@-chflags -R noschg ${DESTDIR}${KODIR}.old
 	-rm -rf ${DESTDIR}${KODIR}.old
 .endif
 	mv ${DESTDIR}${KODIR} ${DESTDIR}${KODIR}.old
@@ -261,6 +262,7 @@ kernel-install kernel-install.debug:
 		${KERNEL_KO}${.TARGET:S/kernel-install//} ${DESTDIR}${KODIR}
 
 kernel-reinstall kernel-reinstall.debug:
+	@-chflags -R noschg ${DESTDIR}${KODIR}
 	install -c -m 555 -o root -g wheel \
 		${KERNEL_KO}${.TARGET:S/kernel-reinstall//} ${DESTDIR}${KODIR}
 
diff --git a/sys/conf/Makefile.ia64 b/sys/conf/Makefile.ia64
index a589b0034e00..cfa9f74fd759 100644
--- a/sys/conf/Makefile.ia64
+++ b/sys/conf/Makefile.ia64
@@ -256,6 +256,7 @@ kernel-install kernel-install.debug:
 	fi
 .if exists(${DESTDIR}${KODIR})
 .if exists(${DESTDIR}${KODIR}.old)
+	@-chflags -R noschg ${DESTDIR}${KODIR}.old
 	-rm -rf ${DESTDIR}${KODIR}.old
 .endif
 	mv ${DESTDIR}${KODIR} ${DESTDIR}${KODIR}.old
@@ -265,6 +266,7 @@ kernel-install kernel-install.debug:
 		${KERNEL_KO}${.TARGET:S/kernel-install//} ${DESTDIR}${KODIR}
 
 kernel-reinstall kernel-reinstall.debug:
+	@-chflags -R noschg ${DESTDIR}${KODIR}
 	install -c -m 555 -o root -g wheel \
 		${KERNEL_KO}${.TARGET:S/kernel-reinstall//} ${DESTDIR}${KODIR}
 
diff --git a/sys/conf/Makefile.pc98 b/sys/conf/Makefile.pc98
index bce1d593be03..6bac3f4956e7 100644
--- a/sys/conf/Makefile.pc98
+++ b/sys/conf/Makefile.pc98
@@ -255,6 +255,7 @@ kernel-install kernel-install.debug:
 	fi
 .if exists(${DESTDIR}${KODIR})
 .if exists(${DESTDIR}${KODIR}.old)
+	@-chflags -R noschg ${DESTDIR}${KODIR}.old
 	-rm -rf ${DESTDIR}${KODIR}.old
 .endif
 	mv ${DESTDIR}${KODIR} ${DESTDIR}${KODIR}.old
@@ -264,6 +265,7 @@ kernel-install kernel-install.debug:
 		${KERNEL_KO}${.TARGET:S/kernel-install//} ${DESTDIR}${KODIR}
 
 kernel-reinstall kernel-reinstall.debug:
+	@-chflags -R noschg ${DESTDIR}${KODIR}
 	install -c -m 555 -o root -g wheel \
 		${KERNEL_KO}${.TARGET:S/kernel-reinstall//} ${DESTDIR}${KODIR}
 
diff --git a/sys/conf/Makefile.powerpc b/sys/conf/Makefile.powerpc
index 1d5e1dce0683..b329c11a3f22 100644
--- a/sys/conf/Makefile.powerpc
+++ b/sys/conf/Makefile.powerpc
@@ -252,6 +252,7 @@ kernel-install kernel-install.debug:
 	fi
 .if exists(${DESTDIR}${KODIR})
 .if exists(${DESTDIR}${KODIR}.old)
+	@-chflags -R noschg ${DESTDIR}${KODIR}.old
 	-rm -rf ${DESTDIR}${KODIR}.old
 .endif
 	mv ${DESTDIR}${KODIR} ${DESTDIR}${KODIR}.old
@@ -261,6 +262,7 @@ kernel-install kernel-install.debug:
 		${KERNEL_KO}${.TARGET:S/kernel-install//} ${DESTDIR}${KODIR}
 
 kernel-reinstall kernel-reinstall.debug:
+	@-chflags -R noschg ${DESTDIR}${KODIR}
 	install -c -m 555 -o root -g wheel \
 		${KERNEL_KO}${.TARGET:S/kernel-reinstall//} ${DESTDIR}${KODIR}