MoltenVK comes from nixpkgs rather than Homebrew, so the `brew --prefix`
lookup is a hard build failure here. fixup_bundle() copies dependencies into
the output and rewrites their install names, which fails in the Nix store
layout, and signing.cmake resolves its bundle root to
${CMAKE_INSTALL_PREFIX}/../.. -- i.e. /nix -- and would chmod and re-sign every
dylib it finds there.

diff --git a/src/ngscopeclient/CMakeLists.txt b/src/ngscopeclient/CMakeLists.txt
--- a/src/ngscopeclient/CMakeLists.txt
+++ b/src/ngscopeclient/CMakeLists.txt
@@ -278,28 +278,9 @@ if(LINUX)
 endif()

 if(APPLE)
-	set(APPS "\${CMAKE_INSTALL_PREFIX}/bin/ngscopeclient")
-	set(DIRS "\${CMAKE_INSTALL_PREFIX}/lib")
-	set(FRAMEWORKS "\${CMAKE_INSTALL_PREFIX}/Frameworks")
-	execute_process(
-		COMMAND brew --prefix molten-vk
-		RESULT_VARIABLE MOLTEN_VK_RESULT
-		OUTPUT_VARIABLE MOLTEN_VK_OUTPUT
-		ERROR_QUIET
-		OUTPUT_STRIP_TRAILING_WHITESPACE
-	)
-	if(NOT MOLTEN_VK_RESULT EQUAL 0)
-		message(FATAL_ERROR "failed to find Homebrew prefix for molten-vk")
-	endif()
 	# https://vulkan.lunarg.com/doc/view/1.3.275.0/mac/getting_started.html#application-bundle-structure-on-macos
 	install(FILES "${CMAKE_SOURCE_DIR}/src/ngscopeclient/macos/MoltenVK_icd.json"
 		DESTINATION bin/vulkan/icd.d/)
-	install(FILES "${MOLTEN_VK_OUTPUT}/lib/libMoltenVK.dylib" DESTINATION lib)
-	install(CODE "
-		include(BundleUtilities)
-		fixup_bundle(\"${APPS}\" \"${DIRS}/libMoltenVK.dylib\" \"${DIRS}\")
-		include(\"${CMAKE_SOURCE_DIR}/src/ngscopeclient/macos/signing.cmake\")
-		")
 endif()

 # ngscopeclient Windows portable zip/MSI installer build