diff --git a/build.sh b/build.sh
index 0c980e3619e..5ed6eefc916 100755
--- a/build.sh
+++ b/build.sh
@@ -30,7 +30,8 @@ usage() {
 }
 
 SDKVER="2024-02-18_732134932b"
-
+DASHARO_SDK=${DASHARO_SDK:-"ghcr.io/dasharo/dasharo-sdk:latest"}
+BUILD_TIMELESS=${BUILD_TIMELESS:-0}
 
 function build_optiplex_9010 {
   DEFCONFIG=$1
@@ -43,13 +44,13 @@ function build_optiplex_9010 {
 
   # Get FW version
   FW_VERSION=$(cat ${DEFCONFIG} | grep CONFIG_LOCALVERSION | cut -d '=' -f 2 | tr -d '"')
-  
+
   # Combine FW flavor with version
   FW_VERSION="${FW_FLAVOR}_${FW_VERSION}"
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make distclean"
 
   cp "${DEFCONFIG}" .config
@@ -60,7 +61,7 @@ function build_optiplex_9010 {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make olddefconfig && make -j$(nproc)"
 
   cp build/coreboot.rom ${BOARD}_${FW_VERSION}.rom
@@ -79,7 +80,7 @@ function build_msi {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make distclean"
 
   cp "${DEFCONFIG}" .config
@@ -90,7 +91,7 @@ function build_msi {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make olddefconfig && make -j$(nproc)"
 
   cp build/coreboot.rom ${BOARD}_${FW_VERSION}_$1.rom
@@ -122,7 +123,7 @@ function build_protectli_vault {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make olddefconfig && make -j$(nproc)"
 
   cp build/coreboot.rom protectli_${BOARD}_${FW_VERSION}.rom
@@ -145,7 +146,7 @@ function build_v1x10 {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make distclean"
 
   cp $DEFCONFIG .config
@@ -154,7 +155,7 @@ function build_v1x10 {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make olddefconfig && make -j$(nproc)"
 
   cp build/coreboot.rom protectli_$1_${FW_VERSION}.rom
@@ -180,7 +181,7 @@ function build_pcengines {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make distclean"
 
   cp $DEFCONFIG .config
@@ -189,7 +190,8 @@ function build_pcengines {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -e BUILD_TIMELESS=${BUILD_TIMELESS} \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make olddefconfig && make -j$(nproc)"
 
   cp build/coreboot.rom pcengines_${VARIANT}_${FW_VERSION}.rom
@@ -213,7 +215,7 @@ function build_qemu {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make distclean"
 
   cp $DEFCONFIG .config
@@ -222,7 +224,8 @@ function build_qemu {
 
   docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
     -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
+    -e BUILD_TIMELESS=${BUILD_TIMELESS} \
+    -w /home/coreboot/coreboot ${DASHARO_SDK} \
     /bin/bash -c "make olddefconfig && make -j$(nproc)"
 
   cp build/coreboot.rom qemu_q35_${FW_VERSION}.rom
@@ -236,7 +239,7 @@ function build_qemu {
 }
 
 function build_odroid_h4 {
-  DEFCONFIG="configs/config.hardkernel_odroid_h4"
+  DEFCONFIG=$1
   FW_VERSION=$(cat ${DEFCONFIG} | grep CONFIG_LOCALVERSION | cut -d '=' -f 2 | tr -d '"')
 
   # checkout several submodules needed by these boards (some others are checked
@@ -244,19 +247,52 @@ function build_odroid_h4 {
   git submodule update --init --force --checkout \
       3rdparty/dasharo-blobs
 
-  docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
-    -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
-    /bin/bash -c "make distclean"
+  if [ "${AIRGAP}" -eq 1 ]; then
+    docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
+      -v $HOME/.ssh:/home/coreboot/.ssh \
+      -w /home/coreboot/coreboot ${DASHARO_SDK} \
+      /bin/bash -c "make clean"
+  else
+    docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
+      -v $HOME/.ssh:/home/coreboot/.ssh \
+      -w /home/coreboot/coreboot ${DASHARO_SDK} \
+      /bin/bash -c "make distclean"
+  fi
 
   cp $DEFCONFIG .config
 
   echo "Building Dasharo compatbile with Hardkernel ODROID H4 (version $FW_VERSION)"
 
-  docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
-    -v $HOME/.ssh:/home/coreboot/.ssh \
-    -w /home/coreboot/coreboot coreboot/coreboot-sdk:$SDKVER \
-    /bin/bash -c "make olddefconfig && make -j$(nproc)"
+  if [ "${AIRGAP}" -eq 1 ]; then
+
+    # In this situation we assume that provided repository is ready to be used
+    # and nothing should be downloaded during build process.
+
+    if [ -d "${EDK2_REPO_PATH}" ]; then
+      # Without following sequence workspce would be created by docker with root
+      # privilidges and build will fail.
+      # Target directory
+      TARGET_DIR="payloads/external/edk2/workspace/Dasharo"
+      mkdir -p "$TARGET_DIR"
+      chown -R $(id -u):$(id -g) "$TARGET_DIR"
+      chmod -R 755 "$TARGET_DIR"
+      docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
+        -v $HOME/.ssh:/home/coreboot/.ssh \
+        --network none \
+        ${EDK2_REPO_PATH:+-v $EDK2_REPO_PATH:/home/coreboot/coreboot/payloads/external/edk2/workspace/Dasharo} \
+        -e BUILD_TIMELESS=${BUILD_TIMELESS} \
+        -w /home/coreboot/coreboot ${DASHARO_SDK} \
+        /bin/bash -c "make olddefconfig && make -j$(nproc)"
+    else
+      echo "EDK2_REPO_PATH is not defined in AIRGAP!"
+      exit 1
+    fi
+  else
+    docker run --rm -t -u $UID -v $PWD:/home/coreboot/coreboot \
+      -v $HOME/.ssh:/home/coreboot/.ssh \
+      -w /home/coreboot/coreboot ${DASHARO_SDK} \
+      /bin/bash -c "make olddefconfig && make -j$(nproc)"
+  fi
 
   cp build/coreboot.rom hardkernel_odroid_h4_${FW_VERSION}.rom
   if [ $? -eq 0 ]; then
@@ -350,7 +386,12 @@ case "$CMD" in
         build_qemu "_all_menus"
         ;;
     "odroid_h4" | "odroid_H4" | "ODROID_H4" )
-        build_odroid_h4
+        BOARD="odroid_h4"
+        build_odroid_h4 "configs/config.hardkernel_odroid_h4"
+        ;;
+    "odroid_h4_btg" )
+        BOARD="odroid_h4"
+        build_odroid_h4 "configs/config.hardkernel_odroid_h4_btg"
         ;;
     *)
         echo "Invalid command: \"$CMD\""