diff --git a/sci-astronomy/cpl/cpl-6.6.1.ebuild b/sci-astronomy/cpl/cpl-6.6.1.ebuild
index a2d5fdfc6e725..a345ee0363469 100644
--- a/sci-astronomy/cpl/cpl-6.6.1.ebuild
+++ b/sci-astronomy/cpl/cpl-6.6.1.ebuild
@@ -1,11 +1,11 @@
-# Copyright 1999-2016 Gentoo Foundation
+# Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
 
 JAVA_PKG_OPT_USE=gasgano
 
-inherit autotools java-pkg-opt-2
+inherit autotools java-pkg-opt-2 ltprune
 
 DESCRIPTION="ESO common pipeline library for astronomical data reduction"
 HOMEPAGE="http://www.eso.org/sci/software/cpl/"
diff --git a/sci-astronomy/cpl/cpl-7.0.ebuild b/sci-astronomy/cpl/cpl-7.0.ebuild
index 6a7182c47d26d..083456654a5c6 100644
--- a/sci-astronomy/cpl/cpl-7.0.ebuild
+++ b/sci-astronomy/cpl/cpl-7.0.ebuild
@@ -1,11 +1,11 @@
-# Copyright 1999-2016 Gentoo Foundation
+# Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
 
 JAVA_PKG_OPT_USE=gasgano
 
-inherit autotools java-pkg-opt-2
+inherit autotools java-pkg-opt-2 ltprune
 
 DESCRIPTION="ESO common pipeline library for astronomical data reduction"
 HOMEPAGE="http://www.eso.org/sci/software/cpl/"