Fix skip_build

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

rust-smallvec.spec

@@ -6,7 +6,7 @@
 
 Name:           rust-%{crate}
 Version:        0.6.9
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        'Small vector' optimization: store up to a small number of items on the stack
 
 # Upstream license specification: MIT/Apache-2.0
@@ -20,9 +20,11 @@ BuildArch:      noarch
 %endif
 
 BuildRequires:  rust-packaging
+%if ! %{__cargo_skip_build}
 %if %{with check}
 BuildRequires:  (crate(bincode/default) >= 1.0.1 with crate(bincode/default) < 2.0.0)
 %endif
+%endif
 
 %global _description %{expand:
 'Small vector' optimization: store up to a small number of items on the stack.}
@@ -131,6 +133,9 @@ which use "union" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Sun Jun 09 12:25:20 CEST 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.6.9-4
+- Fix skip_build
+
 * Sun Jun 09 11:01:48 CEST 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.6.9-3
 - Regenerate