diff --git a/pkgs/sandbox-lib/info.rkt b/pkgs/sandbox-lib/info.rkt
new file mode 100644
index 0000000..53c9302
--- /dev/null
+++ b/pkgs/sandbox-lib/info.rkt
@@ -0,0 +1,2 @@
+#lang setup/infotab
+(define collection 'multi)
diff --git a/racket/lib/collects/mzlib/sandbox.rkt b/pkgs/sandbox-lib/mzlib/sandbox.rkt
similarity index 100%
rename from racket/lib/collects/mzlib/sandbox.rkt
rename to pkgs/sandbox-lib/mzlib/sandbox.rkt