diff --git a/unshield.spec b/unshield.spec
index 97e2434..ab27f0c 100644
--- a/unshield.spec
+++ b/unshield.spec
@@ -2,14 +2,16 @@ Name:          unshield
 Version:       1.6.2
 Release:       %autorelease
 Summary:       Extract CAB files from InstallShield installers
+SourceLicense: MIT and LicenseRef-RSA
 License:       MIT
 URL:           https://github.com/twogood/unshield
 VCS:           git:%{url}.git
 Source0:       %{url}/archive/%{version}/%{name}-%{version}.tar.gz
-BuildRequires: cmake
 BuildRequires: gcc
 BuildRequires: openssl-devel
 BuildRequires: zlib-devel
+BuildSystem:   cmake
+BuildOption(conf): -DUSE_OUR_OWN_MD5=OFF
 
 %description
 This tool allows the extraction of InstallShield format cabinet files (which
@@ -26,16 +28,6 @@ Requires:      %{name}%{?_isa} = %{version}-%{release}
 The %{name}-devel package contains the files needed for development with
 %{name}.
 
-%prep
-%autosetup -p1 -n %{name}-%{version}
-
-%build
-%cmake -DUSE_OUR_OWN_MD5=OFF
-%cmake_build
-
-%install
-%cmake_install
-
 %files
 %license LICENSE
 %doc README.md