2 files changed, 4 insertions, 0 deletions
diff --git a/test/sandbox/tool/main.go b/test/sandbox/tool/main.go
index 77310744..f53950ce 100644
--- a/test/sandbox/tool/main.go
+++ b/test/sandbox/tool/main.go
@@ -1,3 +1,5 @@
+//go:build testtool
+
 package main
 
 import (
diff --git a/test/sandbox/tool/package.nix b/test/sandbox/tool/package.nix
index 43e21ca5..92829b29 100644
--- a/test/sandbox/tool/package.nix
+++ b/test/sandbox/tool/package.nix
@@ -17,6 +17,8 @@ buildGoModule rec {
   };
   vendorHash = null;
 
+  tags = [ "testtool" ];
+
   buildInputs = [ util-linux ];
   nativeBuildInputs = [ pkg-config ];