diff --git a/sys/conf/kern.opts.mk b/sys/conf/kern.opts.mk
--- a/sys/conf/kern.opts.mk
+++ b/sys/conf/kern.opts.mk
@@ -56,6 +56,7 @@
     KERNEL_RETPOLINE \
     RATELIMIT \
     REPRODUCIBLE_BUILD \
+    REPRODUCIBLE_PATHS \
     VERIEXEC
 
 # Some options are totally broken on some architectures. We disable them. If you
diff --git a/sys/conf/kern.post.mk b/sys/conf/kern.post.mk
--- a/sys/conf/kern.post.mk
+++ b/sys/conf/kern.post.mk
@@ -372,7 +372,7 @@
 _ILINKS+= i386
 .endif
 
-.if ${MK_REPRODUCIBLE_BUILD} != "no"
+.if ${MK_REPRODUCIBLE_PATHS} != "no"
 PREFIX_SYSDIR=/usr/src/sys
 PREFIX_OBJDIR=/usr/obj/usr/src/${MACHINE}.${MACHINE_CPUARCH}/sys/${KERN_IDENT}
 CFLAGS+= -ffile-prefix-map=${SYSDIR}=${PREFIX_SYSDIR}
diff --git a/sys/conf/kmod.mk b/sys/conf/kmod.mk
--- a/sys/conf/kmod.mk
+++ b/sys/conf/kmod.mk
@@ -303,7 +303,7 @@
 beforedepend: ${_ILINKS}
 beforebuild: ${_ILINKS}
 
-.if ${MK_REPRODUCIBLE_BUILD} != "no"
+.if ${MK_REPRODUCIBLE_PATHS} != "no"
 PREFIX_SYSDIR=/usr/src/sys
 CFLAGS+= -ffile-prefix-map=${SYSDIR}=${PREFIX_SYSDIR}
 .if defined(KERNBUILDDIR)