diff --git a/third_party/CMakeLists.txt b/third_party/CMakeLists.txt
index 8ee9864..b8a22a5 100644
--- a/third_party/CMakeLists.txt
+++ b/third_party/CMakeLists.txt
@@ -47,7 +47,11 @@ endif()
 # brotli
 if (NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/brotli/c/include/brotli/decode.h" OR
     JPEGXL_FORCE_SYSTEM_BROTLI)
-  find_package(Brotli)
+  find_package(Brotli NAMES unofficial-brotli REQUIRED)
+  foreach(brlib IN ITEMS brotlienc brotlidec brotlicommon)
+      add_library(${brlib} ALIAS unofficial::brotli::${brlib})
+      add_library(${brlib}-static ALIAS unofficial::brotli::${brlib})
+  endforeach()
   if (NOT Brotli_FOUND)
     message(FATAL_ERROR
         "Brotli not found, install brotli-dev or download brotli source code to"
@@ -111,7 +120,8 @@ if (JPEGXL_ENABLE_SKCMS OR JPEGXL_ENABLE_PLUGINS)
 endif ()
 if (JPEGXL_ENABLE_VIEWERS OR NOT JPEGXL_ENABLE_SKCMS)
   if( NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/lcms/.git" OR JPEGXL_FORCE_SYSTEM_LCMS2 )
-    find_package(LCMS2 2.13)
+    find_package(LCMS2 NAMES lcms2 REQUIRED)
+    add_library(lcms2 ALIAS lcms2::lcms2)
     if ( NOT LCMS2_FOUND )
       message(FATAL_ERROR "Please install lcms2 or run git submodule update --init")
     endif ()