diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index b846e0a..7ede47f 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -36,10 +36,6 @@ jobs:
       env:
         CROSS_COMPILE: "ccache ${{ github.workspace }}/tools/aarch64-linux-gnu-gcc/bin/aarch64-linux-gnu-"
         CC: "ccache ${{ github.workspace }}/tools/aarch64-linux-gnu-gcc/bin/aarch64-linux-gnu-gcc"
-        KBUILD_BUILD_USER: uuuuuuuuuuuuuuuuuuuuuuuuuuuuu
-        KBUILD_BUILD_HOST: hhhhhhhhhhhhhhhhhhhhhhhhhhhhh
-        KBUILD_BUILD_TIMESTAMP: yyyyyyyyyyyyyyyyyyyyyyyyyyyyy
-        KBUILD_BUILD_VERSION: vvvvvvvvvvvvvvvvvvvvvvvvvvvvv
 
     - uses: actions/upload-artifact@v4
       with:
diff --git a/build_kernel.sh b/build_kernel.sh
index 9c12b16..5a0d72b 100755
--- a/build_kernel.sh
+++ b/build_kernel.sh
@@ -24,6 +24,11 @@ export CROSS_COMPILE=${CROSS_COMPILE:-"$TOOLS/aarch64-linux-gnu-gcc/bin/aarch64-
 export CC=${CC:-"$TOOLS/aarch64-linux-gnu-gcc/bin/aarch64-linux-gnu-gcc"}
 export LD=$TOOLS/aarch64-linux-gnu-gcc/bin/aarch64-linux-gnu-ld.bfd
 
+export KBUILD_BUILD_USER=user
+export KBUILD_BUILD_HOST=host
+export KBUILD_BUILD_TIMESTAMP=$(TZ=UTC date -d @$(cd agnos-kernel-sdm845; git show -s --format=%ct))
+export KBUILD_BUILD_VERSION=$(cd agnos-kernel-sdm845; git rev-parse HEAD)
+
 # these do anything?
 export KCFLAGS="-w"