diff --git a/java-flute.spec b/java-flute.spec
index 4b65315..4c08afa 100644
--- a/java-flute.spec
+++ b/java-flute.spec
@@ -2,18 +2,20 @@
 %define        javahome  %{_jvmdir}/jdk
 Name:          java-flute
 Version:       1.3.0
-Release:       3mamba
+Release:       4mamba
 Summary:       Java CSS parser using SAC
 Group:         Development/Libraries/Java
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://www.w3.org/Style/CSS/SAC/
-Source:        https://www.w3.org/2002/06/flutejava-%{pkgver}.zip
+Source:        https://sourceforge.net/projects/jfreereport/files/30.%20OpenOffice%20Branches/OOo31/flute-%{version}-OOo31.zip
 License:       W3C, LGPL
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
 BuildRequires: javapackages
+BuildRequires: apache-ant
+BuildRequires: java-sac
 Requires:      java-sac
 Requires:      javapackages
 
@@ -21,15 +23,19 @@ Requires:      javapackages
 A Cascading Style Sheets parser using the Simple API for CSS, for Java.
 
 %prep
-%setup -q -n flute-%{pkgver}
+%setup -q -c
+find . -name "*.jar" -exec rm -f {} \;
+mkdir -p lib
+build-jar-repository -s -p lib sac
 
 %build
+ant jar javadoc
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
 mkdir -p %{buildroot}%{_javadir}
-install -pm 644 flute.jar %{buildroot}%{_javadir}/flute-%{version}.jar
+install -pm 644 build/lib/flute.jar %{buildroot}%{_javadir}/flute-%{version}.jar
 ln -sf flute-%{version}.jar %{buildroot}%{_javadir}/flute.jar
 
 %clean
@@ -42,6 +48,9 @@ ln -sf flute-%{version}.jar %{buildroot}%{_javadir}/flute.jar
 %doc COPYRIGHT.html
 
 %changelog
+* Fri Dec 10 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.3.0-4mamba
+- rebuilt with ant
+
 * Thu Dec 02 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.3.0-3mamba
 - rebuilt using upstream jar