diff '--color=auto' -ur libbluray-1.4.1/src/libbluray/bdj/bdj.c libbluray-1.4.1-jars/src/libbluray/bdj/bdj.c
--- libbluray-1.4.1/src/libbluray/bdj/bdj.c	2026-01-26 20:37:11.000000000 +0000
+++ libbluray-1.4.1-jars/src/libbluray/bdj/bdj.c	2026-04-10 18:41:22.911125238 +0100
@@ -22,6 +22,9 @@
 #include "config.h"
 #endif
 
+#undef VERSION
+#define VERSION "gentoo"
+
 #include "bdj.h"
 
 #include "native/register_native.h"
diff '--color=auto' -ur libbluray-1.4.1/src/libbluray/bdj/meson.build libbluray-1.4.1-jars/src/libbluray/bdj/meson.build
--- libbluray-1.4.1/src/libbluray/bdj/meson.build	2026-01-26 20:37:11.000000000 +0000
+++ libbluray-1.4.1-jars/src/libbluray/bdj/meson.build	2026-04-10 18:14:37.889605089 +0100
@@ -45,13 +45,13 @@
               '-Dsrc_awt=:' + awt_src,
               '-Djavac_path=' + javac_path,
               '-Djavac_arg=' + javac_arg,
-              f'-Dversion=@bdj_type@-@libbluray_version@',
+              f'-Dversion=@bdj_type@-gentoo',
               f'-Djava_version_asm=@java_src_version_asm@',
               f'-Djava_version_bdj=@java_src_version@'],
-    output: [f'libbluray-@bdj_type@-@libbluray_version@.jar',
-             f'libbluray-awt-@bdj_type@-@libbluray_version@.jar'],
+    output: [f'libbluray-@bdj_type@-gentoo.jar',
+             f'libbluray-awt-@bdj_type@-gentoo.jar'],
     build_always_stale: true,
     install: true,
     install_tag: 'runtime',
-    install_dir: get_option('datadir') / 'java',
+    install_dir: get_option('datadir') / 'libbluray/lib',
 )