Patch from:
https://github.com/falcosecurity/libs/commit/7f01ec89c565fcb45ade833b1312ae69637bc4ec

From: Federico Di Pierro <nierro92@gmail.com>
Date: Fri, 28 Mar 2025 08:35:23 +0100
Subject: [PATCH] fix(driver): fix driver and bpf makefile for linux 6.13.

Signed-off-by: Federico Di Pierro <nierro92@gmail.com>
---
 driver/Makefile.in  | 2 +-
 driver/bpf/Makefile | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/driver/Makefile.in b/driver/Makefile.in
index 7b1fdc2dba..ec60103d0d 100644
--- a/driver/Makefile.in
+++ b/driver/Makefile.in
@@ -29,7 +29,7 @@ install: all
 
 else
 
-KERNELDIR 	?= $(CURDIR)
+KERNELDIR 	?= $(realpath $(objtree))
 #
 # Get the path of the module sources
 #
diff --git a/driver/bpf/Makefile b/driver/bpf/Makefile
index 58d1b11165..c94647c608 100644
--- a/driver/bpf/Makefile
+++ b/driver/bpf/Makefile
@@ -28,7 +28,7 @@ clean:
 
 else
 
-KERNELDIR 	?= $(CURDIR)
+KERNELDIR 	?= $(realpath $(objtree))
 #
 # Get the path of the module sources
 #
