diff --git a/gap-json.spec b/gap-json.spec
index 72c076d..a9b58f7 100644
--- a/gap-json.spec
+++ b/gap-json.spec
@@ -25,9 +25,9 @@ Group:          Productivity/Scientific/Math
 URL:            http://gap-packages.github.io/json/
 #Git-Clone:     https://github.com/gap-packages/json
 Source:         https://github.com/gap-packages/json/releases/download/v%version/json-%version.tar.gz
+BuildRequires:  c++_compiler
+BuildRequires:  gap-devel
 BuildRequires:  gap-rpm-devel
-BuildRequires:  xz
-BuildArch:      noarch
 Requires:       gap-core >= 4.12
 Requires:       gap-gapdoc >= 1.5
 
@@ -38,9 +38,14 @@ Enhances GAP by the ability to read and write JSON files.
 %autosetup -n json-%version
 
 %build
+./configure "%gapdir"
+%make_build
 
 %install
 %gappkg_simple_install
+pushd "%buildroot/$fmoddir/"
+find src -type f ! -name LICENSE -delete
+popd
 
 %files -f %name.files