Linker errors on iOS/FFmpeg

Trying multimedia apps on iOS with 6.9 beta 3 from our installer, FFmpeg gives me runtime errors with libiconv not found (referenced from libavcodec.framework):

dyld[3483]: Library not loaded: @rpath/libiconv.framework/libiconv
Referenced from: <134B639C-3BC1-3025-9700-810FC9AC68E8> /private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libavcodec.framework/libavcodec
Reason: tried: '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libiconv.framework/libiconv' (no such file), '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libiconv.framework/libiconv' (no such file)Library not loaded: @rpath/libSystem.framework/libSystem
Referenced from: <C1B6D4C8-3D4A-3DD1-8A60-E4DFF59B682A> /private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libavformat.framework/libavformat
Reason: tried: '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libSystem.framework/libSystem' (no such file), '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libSystem.framework/libSystem' (no such file)Library not loaded: @rpath/libSystem.framework/libSystem
Referenced from: <75D1AB91-ADCE-3BD9-9B01-21E204C4CAC0> /private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libavutil.framework/libavutil
Reason: tried: '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libSystem.framework/libSystem' (no such file), '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libSystem.framework/libSystem' (no such file)Library not loaded: @rpath/libSystem.framework/libSystem
Referenced from: <8654BF8C-F331-3BA5-93E9-425DAFF8DC33> /private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libswresample.framework/libswresample
Reason: tried: '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libSystem.framework/libSystem' (no such file), '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libSystem.framework/libSystem' (no such file)Library not loaded: @rpath/libSystem.framework/libSystem
Referenced from: <5530CC5A-A0F0-3A8B-BF4F-D0AD0F895617> /private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libswscale.framework/libswscale
Reason: tried: '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libSystem.framework/libSystem' (no such file), '/private/var/containers/Bundle/Application/2DF7EBD0-489D-4D28-9220-941F5AFF4A9C/player.app/Frameworks/libSystem.framework/libSystem' (no such file)
Message from debugger: killed
Program ended with exit code: 9