diff --git a/rust-iovec.spec b/rust-iovec.spec
index caf2c01..90fc22b 100644
--- a/rust-iovec.spec
+++ b/rust-iovec.spec
@@ -9,6 +9,7 @@ Version:        0.1.2
 Release:        3%{?dist}
 Summary:        Portable buffer type for scatter/gather I/O operations
 
+# Upstream license specification: MIT/Apache-2.0
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/iovec
 Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{crate}-%{version}.crate
@@ -19,21 +20,39 @@ Patch0:         iovec-0.1.2-fix-metadata.diff
 ExclusiveArch:  %{rust_arches}
 
 BuildRequires:  rust-packaging
-# [dependencies]
-BuildRequires:  (crate(libc) >= 0.2.0 with crate(libc) < 0.3.0)
+BuildRequires:  (crate(libc/default) >= 0.2.0 with crate(libc/default) < 0.3.0)
 
-%description
-%{summary}.
+%global _description \
+Portable buffer type for scatter/gather I/O operations.
+
+%description %{_description}
 
 %package        devel
 Summary:        %{summary}
 BuildArch:      noarch
 
-%description    devel
-Portable buffer type for scatter/gather I/O operations.
+%description    devel %{_description}
 
 This package contains library source intended for building other packages
-which use %{crate} from crates.io.
+which use "%{crate}" crate.
+
+%files          devel
+%license LICENSE-MIT LICENSE-APACHE
+%doc README.md CHANGELOG.md
+%{cargo_registry}/%{crate}-%{version}/
+%exclude %{cargo_registry}/%{crate}-%{version}/appveyor.yml
+
+%package     -n %{name}+default-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+default-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "default" feature of "%{crate}" crate.
+
+%files       -n %{name}+default-devel
+%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
 
 %prep
 %autosetup -n %{crate}-%{version} -p1
@@ -50,13 +69,10 @@ which use %{crate} from crates.io.
 %cargo_test
 %endif
 
-%files          devel
-%license LICENSE-MIT LICENSE-APACHE
-%doc README.md CHANGELOG.md
-%{cargo_registry}/%{crate}-%{version}/
-%exclude %{cargo_registry}/%{crate}-%{version}/appveyor.yml
-
 %changelog
+* Mon Oct 29 2018 Josh Stone <jistone@redhat.com> - 0.1.2-3
+- Adapt to new packaging
+
 * Sat Jul 14 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.2-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild