no bin

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

rust-error-chain.spec

@@ -2,6 +2,8 @@
 %bcond_without check
 %global debug_package %{nil}
 
+%global __cargo_is_bin() false
+
 %global crate error-chain
 
 Name:           rust-%{crate}