diff --git a/tzdata.spec b/tzdata.spec
index 71d2d0a..9c74b27 100644
--- a/tzdata.spec
+++ b/tzdata.spec
@@ -17,6 +17,7 @@ Patch003: 0003-continue-to-ship-posixrules.patch
 BuildRequires: make
 BuildRequires: gawk, glibc, perl-interpreter
 BuildRequires: java-devel
+BuildRequires: java-1.8.0-devel
 BuildRequires: glibc-common >= 2.5.90-7
 Conflicts: glibc-common <= 2.3.2-63
 BuildArchitectures: noarch
@@ -112,7 +113,7 @@ JAVA_FILES="rearguard/africa rearguard/antarctica rearguard/asia \
 
 # Java 6/7 tzdata
 pushd javazic
-javac -source 1.6 -target 1.6 -classpath . `find . -name \*.java`
+/usr/lib/jvm/java-1.8.0-openjdk/bin/javac -source 1.6 -target 1.6 -classpath . `find . -name \*.java`
 popd
 
 java -classpath javazic/ rht.tools.javazic.Main -V %{version} \
@@ -121,7 +122,7 @@ java -classpath javazic/ rht.tools.javazic.Main -V %{version} \
 
 # Java 8 tzdata
 pushd javazic-1.8
-javac -source 1.8 -target 1.8 -classpath . `find . -name \*.java`
+/usr/lib/jvm/java-17-openjdk/bin/javac -source 1.8 -target 1.8 -classpath . `find . -name \*.java`
 popd
 
 java -classpath javazic-1.8 build.tools.tzdb.TzdbZoneRulesCompiler \
@@ -153,6 +154,8 @@ install -p -m 644 tzdb.dat $RPM_BUILD_ROOT%{_datadir}/javazi-1.8/
 %changelog
 * Sat Feb 05 2022 Jiri Vanek <jvanek@redhat.com> - 2021e-3
 - Rebuilt for java-17-openjdk as system jdk
+- to keep the legacy tzdata, now build requires both jdk8 and system.
+- I recomed to put legacy tz data to separate subpkg or to drop them all
 
 * Sat Jan 22 2022 Fedora Release Engineering <releng@fedoraproject.org> - 2021e-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild