diff --git a/rust-extprim.spec b/rust-extprim.spec
index bc8a324..c6a0031 100644
--- a/rust-extprim.spec
+++ b/rust-extprim.spec
@@ -7,9 +7,10 @@
 
 Name:           rust-%{crate}
 Version:        1.6.0
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Extra primitive types (u128, i128)
 
+# Upstream license specification: MIT/Apache-2.0
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/extprim
 Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{crate}-%{version}.crate
@@ -17,30 +18,82 @@ Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{
 ExclusiveArch:  %{rust_arches}
 
 BuildRequires:  rust-packaging
-# [dependencies]
-BuildRequires:  (crate(num-traits) >= 0.2.0 with crate(num-traits) < 0.3.0)
-BuildRequires:  (crate(rand) >= 0.4.0 with crate(rand) < 0.5.0)
-BuildRequires:  ((crate(serde) >= 1.0.0 with crate(serde) < 2.0.0) with crate(serde/derive))
-# [build-dependencies]
-BuildRequires:  (crate(rustc_version) >= 0.2.0 with crate(rustc_version) < 0.3.0)
-BuildRequires:  (crate(semver) >= 0.9.0 with crate(semver) < 0.10.0)
+BuildRequires:  (crate(num-traits/default) >= 0.2.0 with crate(num-traits/default) < 0.3.0)
+BuildRequires:  (crate(rand/default) >= 0.4.0 with crate(rand/default) < 0.5.0)
+BuildRequires:  (crate(rustc_version/default) >= 0.2.0 with crate(rustc_version/default) < 0.3.0)
+BuildRequires:  (crate(semver/default) >= 0.9.0 with crate(semver/default) < 0.10.0)
+BuildRequires:  (crate(serde/default) >= 1.0.0 with crate(serde/default) < 2.0.0)
+BuildRequires:  (crate(serde/derive) >= 1.0.0 with crate(serde/derive) < 2.0.0)
 %if %{with check}
-# [dev-dependencies]
-BuildRequires:  (crate(extprim_literals) >= 2.0.0 with crate(extprim_literals) < 3.0.0)
+BuildRequires:  (crate(extprim_literals/default) >= 2.0.0 with crate(extprim_literals/default) < 3.0.0)
 %endif
 
-%description
-%{summary}.
+%global _description \
+Extra primitive types (u128, i128).
+
+%description %{_description}
 
 %package        devel
 Summary:        %{summary}
 BuildArch:      noarch
 
-%description    devel
-Extra primitive types (u128, i128).
+%description    devel %{_description}
+
+This package contains library source intended for building other packages
+which use "%{crate}" crate.
+
+%files          devel
+%license LICENSE-MIT.txt LICENSE-APACHE.txt
+%doc README.md
+%{cargo_registry}/%{crate}-%{version}/
+
+%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
+
+%package     -n %{name}+rand-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+rand-devel %{_description}
 
 This package contains library source intended for building other packages
-which use %{crate} from crates.io.
+which use "rand" feature of "%{crate}" crate.
+
+%files       -n %{name}+rand-devel
+%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
+
+%package     -n %{name}+serde-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+serde-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "serde" feature of "%{crate}" crate.
+
+%files       -n %{name}+serde-devel
+%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
+
+%package     -n %{name}+use-std-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+use-std-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "use-std" feature of "%{crate}" crate.
+
+%files       -n %{name}+use-std-devel
+%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
 
 %prep
 %autosetup -n %{crate}-%{version} -p1
@@ -57,12 +110,10 @@ which use %{crate} from crates.io.
 %cargo_test
 %endif
 
-%files          devel
-%license LICENSE-MIT.txt LICENSE-APACHE.txt
-%doc README.md
-%{cargo_registry}/%{crate}-%{version}/
-
 %changelog
+* Tue Nov 13 2018 Josh Stone <jistone@redhat.com> - 1.6.0-3
+- Adapt to new packaging
+
 * Sat Jul 14 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.6.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild