diff --git a/build-docker.sh b/build-docker.sh
index dbe019a49..321abdfff 100755
--- a/build-docker.sh
+++ b/build-docker.sh
@@ -382,6 +382,7 @@ EOF
       -v "$DIR/build/core$DIRSUFFIX":/build:z \
       --env TREZOR_MODEL="$TREZOR_MODEL" \
       --env PRODUCTION="$PRODUCTION" \
+      --env BOOTLOADER_DEVEL=1 \
       --init \
       "$SNAPSHOT_NAME" \
       /nix/var/nix/profiles/default/bin/nix-shell --run "bash /local/build/$SCRIPT_NAME"
diff --git a/core/SConscript.prodtest b/core/SConscript.prodtest
index e33c4676a..8b93d7937 100644
--- a/core/SConscript.prodtest
+++ b/core/SConscript.prodtest
@@ -181,7 +181,7 @@ MODEL_IDENTIFIER = tools.get_model_identifier(TREZOR_MODEL)
 if PRODUCTION:
     VENDORHEADER = f'embed/vendorheader/{MODEL_IDENTIFIER}/vendorheader_prodtest_signed_prod.bin'
 elif BOOTLOADER_DEVEL:
-    VENDORHEADER = f'embed/vendorheader/{MODEL_IDENTIFIER}/vendorheader_unsafe_signed_dev.bin'
+    VENDORHEADER = f'embed/vendorheader/{MODEL_IDENTIFIER}/vendorheader_qa_DO_NOT_SIGN_signed_dev.bin'
 else:
     VENDORHEADER = f'embed/vendorheader/{MODEL_IDENTIFIER}/vendorheader_unsafe_signed_prod.bin'