diff --git a/dev-java/javacup/Manifest b/dev-java/javacup/Manifest
index e86cdb7e2e969..5bb555f43821d 100644
--- a/dev-java/javacup/Manifest
+++ b/dev-java/javacup/Manifest
@@ -1 +1,2 @@
DIST java-cup-src-11b-20151001.tar.gz 313405 BLAKE2B 126944916d120dd2150e4a665fea6d216f3d55e002a72b581621df726e4bf0e0664f9ff925189c97162582277c08a4f121e056299ea5a3f5c10cc31d7c0feb9c SHA512 70bb6a0e13fe52694980040205fcf5b3e904c4a07e50c7740c55cc3bb481496c5c071377757b94f59807b936b8c4fdde5423d78cc2d12a7ada1870f71cd9f47e
+DIST java-cup-src-11b-20160615.tar.gz 313847 BLAKE2B 0031cdb73471512162f69fff6ed47e91d78769c5162f37d4fdcef1c4b4be17ec9e950eda973a8842ae95423840be6c43a335180584b81c4618ea43cbfa926972 SHA512 532a8169f8e1ed2c637c66e7e21cc90eea363732870fbf4e3d66acbff03de3ba0583cefb7b4e7b8f8cb0c9bf1ca92dd5a59111860612bc7544e8beab87f5fbda
diff --git a/dev-java/javacup/files/javacup-11b_p20160615-build-xml-svn.patch b/dev-java/javacup/files/javacup-11b_p20160615-build-xml-svn.patch
new file mode 100644
index 0000000000000..eef4e7c33c5b0
--- /dev/null
+++ b/dev-java/javacup/files/javacup-11b_p20160615-build-xml-svn.patch
@@ -0,0 +1,13 @@
+diff --git a/build.xml b/build.xml
+index 91bd60c..57a3bca 100644
+--- a/build.xml
++++ b/build.xml
+@@ -79,7 +79,7 @@
+
+
++ value='+ "v0.11b ${cupversion}"'>
+
+
+
diff --git a/dev-java/javacup/javacup-11b_p20160615.ebuild b/dev-java/javacup/javacup-11b_p20160615.ebuild
new file mode 100644
index 0000000000000..b39fd0acc8833
--- /dev/null
+++ b/dev-java/javacup/javacup-11b_p20160615.ebuild
@@ -0,0 +1,90 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+JAVA_PKG_IUSE="doc source"
+
+inherit java-pkg-2 java-ant-2
+
+MY_PV=${PV/_beta/-}
+MY_PV=${MY_PV/_p/-}
+MY_P=java-cup-${MY_PV%-*}
+
+DESCRIPTION="CUP Parser Generator for Java"
+HOMEPAGE="https://www2.cs.tum.edu/projects/cup/"
+SRC_URI="https://www2.cs.tum.edu/projects/cup/releases/java-cup-src-${MY_PV}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x64-solaris"
+
+DEPEND="dev-java/ant-core:0
+ dev-java/jflex:0
+ >=virtual/jdk-1.8:*"
+
+RDEPEND=">=virtual/jre-1.8:*"
+
+JAVA_ANT_REWRITE_CLASSPATH="yes"
+JAVA_ANT_CLASSPATH_TAGS+=" taskdef"
+
+S="${WORKDIR}"
+
+src_prepare() {
+ default
+ # Bizarrely, you can't build from the tarball without this patch.
+ eapply "${FILESDIR}"/${PN}-11b_p20160615-build-xml-svn.patch
+
+ # The JFlex package name has changed to lower case.
+ sed -i "s/JFlex\./jflex./g" build.xml || die
+
+ # Remove the bundled JFlex.
+ rm -v bin/JFlex.jar || die
+}
+
+src_configure() {
+ EANT_GENTOO_CLASSPATH_EXTRA=$(java-pkg_getjars --build-only ant-core,jflex)
+ java-ant-2_src_configure
+}
+
+src_compile() {
+ # Annoyingly javacup bundles an older version of itself that will
+ # break jflex if that has already been built against this newer
+ # version beforehand. Even more annoyingly, the binary download is
+ # built with Java 8, which isn't much use to us. We therefore use
+ # any installed javacup that is newer than the bundled version where
+ # possible. If this approach turns out to be unworkable then we may
+ # just have to use the bundled jflex for bootstrapping.
+ if has_version \>=${CATEGORY}/${PN}-11b:${SLOT}; then
+ # Use PORTAGE_QUIET to suppress a QA warning that is spurious
+ # thanks to has_version above. This is Portage-specific but
+ # showing the warning elsewhere isn't the end of the world.
+ einfo "Bootstrapping with installed javacup ..."
+ EANT_GENTOO_CLASSPATH_EXTRA+=":$(PORTAGE_QUIET=1 java-pkg_getjars --build-only javacup)" eant
+ else
+ einfo "Bootstrapping with bundled javacup ..."
+ EANT_GENTOO_CLASSPATH_EXTRA+=":${S}/bin/${MY_P:0:-1}.jar" eant
+ fi
+
+ # Clean everything except the new jar.
+ rm -rv java/ classes/ || die
+
+ einfo "Recompiling with newly built javacup ..."
+ EANT_GENTOO_CLASSPATH_EXTRA+=":${S}/dist/${MY_P}.jar" eant
+
+ use doc && ejavadoc -sourcepath src/ -d javadoc java_cup
+}
+
+src_install() {
+ java-pkg_newjar dist/${MY_P}.jar
+ java-pkg_newjar dist/${MY_P}-runtime.jar ${PN}-runtime.jar
+ java-pkg_dolauncher ${PN} --jar ${PN}.jar
+ java-pkg_register-ant-task
+
+ dodoc changelog.txt
+ docinto html
+ dodoc manual.html
+
+ use source && java-pkg_dosrc java/*
+ use doc && java-pkg_dojavadoc javadoc
+}