app-arch/lz4 only provides pkg-config files
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -557 +557,3 @@
-    find_package(lz4 REQUIRED)
+    find_package(PkgConfig REQUIRED)
+    pkg_check_modules(lz4 REQUIRED IMPORTED_TARGET liblz4)
+    add_library(lz4_static ALIAS PkgConfig::lz4)