diff --git a/osbase/build/def.bzl b/osbase/build/def.bzl
index af2562b..b2dfe91 100644
--- a/osbase/build/def.bzl
+++ b/osbase/build/def.bzl
@@ -278,7 +278,7 @@
     table = ctx.actions.declare_file(ctx.attr.name + ".dmt")
     ctx.actions.run(
         mnemonic = "GenVerityImage",
-        progress_message = "Generating a dm-verity image",
+        progress_message = "Generating a dm-verity image: {}".format(image.short_path),
         inputs = [ctx.file.source],
         outputs = [
             image,
diff --git a/osbase/build/efi.bzl b/osbase/build/efi.bzl
index 2f5f363..7488650 100644
--- a/osbase/build/efi.bzl
+++ b/osbase/build/efi.bzl
@@ -55,7 +55,7 @@
     # Run mkpayload.
     ctx.actions.run(
         mnemonic = "GenEFIKernelImage",
-        progress_message = "Generating EFI unified kernel image",
+        progress_message = "Generating EFI unified kernel image: {}".format(image.short_path),
         inputs = inputs,
         outputs = [image],
         executable = ctx.file._mkpayload,