diff -Naur calcoo-2.1.0-old/build.xml calcoo-2.1.0-new/build.xml
--- calcoo-2.1.0-old/build.xml	1969-12-31 21:00:01.000000000 -0300
+++ calcoo-2.1.0-new/build.xml	2022-04-16 15:41:59.763861191 -0300
@@ -16,7 +16,7 @@
     <!-- Create the build directory structure used by compile -->
     <mkdir dir="${build}"/>
     <!-- Compile the java code from ${src} into ${build} -->
-    <javac srcdir="${src}" destdir="${build}" includeantruntime="false"/>
+    <javac srcdir="${src}" destdir="${build}" includeantruntime="false" encoding="iso-8859-1"/>
   </target>
 
   <target name="copyresource" depends="compile">
@@ -31,7 +31,7 @@
   <target name="testcompile">
     <mkdir dir="${testbuild}"/>
     <!-- Compile the java code from ${testsrc} into ${testbuild} -->
-    <javac srcdir="${testsrc}" destdir="${testbuild}" includeantruntime="false">
+    <javac srcdir="${testsrc}" destdir="${testbuild}" includeantruntime="false" encoding="iso-8859-1">
 		<classpath>
 			<pathelement location="${junitpath}\junit.jar"/>
 			<pathelement location="${junitpath}\hamcrest-core.jar"/>