diff --git a/runtimes/scout.yaml b/runtimes/scout.yaml
index 680121d5c07bd05765cb205f2f44cd4c5c8d1e72..86fe470e2ddc1277ddda162311a4e1496eedc812 100644
--- a/runtimes/scout.yaml
+++ b/runtimes/scout.yaml
@@ -28,236 +28,10 @@
 id_prefix: com.valvesoftware.SteamRuntime
 
 add_packages_multiarch:
-  - dconf-gsettings-backend
-  - freeglut3
-  - gtk2-engines
-  - gtk2-engines-murrine
-  - gtk2-engines-pixbuf
-  - libacl1
-  - libappindicator1
-  - libasn1-8-heimdal
-  - libasound2
-  - libasound2-plugins
-  - libasyncns0
-  - libatk1.0-0
-  - libattr1
-  - libavahi-client3
-  - libavahi-common3
-  - libavcodec53
-  - libavfilter2
-  - libavformat53
-  - libavutil51
-  - libbz2-1.0
-  - libcairo2
-  - libcanberra-gtk-module
-  - libcanberra-gtk0
-  - libcanberra0
-  - libcap2
-  - libcg
-  - libcggl
-  - libcomerr2
-  - libcups2
-  - libcurl3
-  - libcurl3-gnutls
-  - libdbus-1-3
-  - libdbus-glib-1-2
-  - libdbusmenu-glib4
-  - libdbusmenu-gtk4
-  - libexif12
-  - libexpat1
-  - libffi6
-  - libflac8
-  - libfltk1.1
-  - libfontconfig1
-  - libfreetype6
-  - libgcc1
-  - libgconf-2-4
-  - libgcrypt11
-  - libgdk-pixbuf2.0-0
-  - libglew1.10
-  - libglew1.6
-  - libglib2.0-0
-  - libglu1-mesa
-  - libgmp10
-  - libgnutls26
-  - libgnutls30
-  - libgomp1
-  - libgpg-error0
-  - libgssapi-krb5-2
-  - libgssapi3-heimdal
-  - libgstreamer-plugins-base0.10-0
-  - libgstreamer0.10-0
-  - libgtk2.0-0
-  - libgtk2.0-common
-  - libgudev-1.0-0
-  - libhcrypto4-heimdal
-  - libheimbase1-heimdal
-  - libheimntlm0-heimdal
-  - libhogweed4
-  - libhx509-5-heimdal
-  - libice6
-  - libidn11
-  - libindicator7
-  - libjack-jackd2-0
-  - libjpeg-turbo8
-  - libjpeg62
-  - libjson0
-  - libk5crypto3
-  - libkeyutils1
-  - libkrb5-26-heimdal
-  - libkrb5-3
-  - libkrb5support0
-  - liblcms2-2
-  - libldap-2.4-2
-  - libltdl7
-  - libmikmod2
-  - libmpg123-0
-  - libncurses5
-  - libncursesw5
-  - libnettle6
-  - libnm-glib4
-  - libnm-util2
-  - libnotify4
-  - libnspr4
-  - libnss3
-  - libogg0
-  - libopenal1
-  - libopus0
-  - libopusfile0
-  - liborc-0.4-0
-  - libp11-kit0
-  - libpango1.0-0
-  - libpci3
-  - libpcre3
-  - libpcrecpp0
-  - libpixman-1-0
-  - libpng12-0
-  - libpulse0
-  - libroken18-heimdal
-  - librtmp0
-  - libsamplerate0
-  - libsasl2-2
-  - libsdl-image1.2
-  - libsdl-mixer1.2
-  - libsdl-ttf2.0-0
-  - libsdl1.2debian
-  - libsdl2
-  - libsdl2-image
-  - libsdl2-mixer
-  - libsdl2-net
-  - libsdl2-ttf
-  - libselinux1
-  - libsm6
-  - libsndfile1
-  - libspeex1
-  - libspeexdsp1
-  - libsqlite3-0
-  - libssl1.0.0
-  - libstdc++6
-  - libswscale2
-  - libtasn1-3
-  - libtasn1-6
-  - libtbb2
-  - libtdb1
-  - libtheora0
-  - libtiff4
-  - libtinfo5
-  - libudev0
-  - libusb-1.0-0
-  - libuuid1
-  - libva-glx1
-  - libva-x11-1
-  - libva1
-  - libvdpau1
-  - libvorbis0a
-  - libvorbisenc2
-  - libvorbisfile3
-  - libvpx1
-  - libvulkan1
-  - libwind0-heimdal
-  - libwrap0
-  - libx11-6
-  - libx11-xcb1
-  - libxau6
-  - libxaw7
-  - libxcb-composite0
-  - libxcb-damage0
-  - libxcb-dpms0
-  - libxcb-dri2-0
-  - libxcb-dri3-0
-  - libxcb-glx0
-  - libxcb-present0
-  - libxcb-randr0
-  - libxcb-record0
-  - libxcb-render0
-  - libxcb-res0
-  - libxcb-screensaver0
-  - libxcb-shape0
-  - libxcb-shm0
-  - libxcb-sync1
-  - libxcb-xevie0
-  - libxcb-xf86dri0
-  - libxcb-xfixes0
-  - libxcb-xinerama0
-  - libxcb-xkb1
-  - libxcb-xprint0
-  - libxcb-xtest0
-  - libxcb-xv0
-  - libxcb-xvmc0
-  - libxcb1
-  - libxcomposite1
-  - libxcursor1
-  - libxdamage1
-  - libxdmcp6
-  - libxext6
-  - libxfixes3
-  - libxft2
-  - libxi6
-  - libxinerama1
-  - libxml2
-  - libxmu6
-  - libxpm4
-  - libxrandr2
-  - libxrender1
-  - libxss1
-  - libxt6
-  - libxtst6
-  - libxxf86vm1
-  - zlib1g
-
-  # Not in the real Runtime, but needed for Intel gfx.
-  # libgl1-mesa-glx is pulled in by libglew1.10 etc., so we might as
-  # well include a complete (albeit obsolete) copy of Mesa that can
-  # at least run llvmpipe
-  - libgl1-mesa-dri
-  - libgl1-mesa-glx
-  - libtxc-dxtn-s2tc0
+  - steamrt-libs
 
 add_packages:
-  - libx11-data
-
-  # Not in the real Runtime, but useful and depended on by Steam
-  - curl
-  - file
-
-  # Not in the real Runtime, but xdg-open is useful
-  - flatpak-xdg-utils
-
-  # Not in the real Runtime, but Steam tries to run lspci
-  - pciutils
-
-  # Not in the real Runtime, but Steam tries to run it. Since Ubuntu
-  # 14.10 (utopic) and Debian 8 (jessie) it's in coreutils instead.
-  - realpath
-
-  # Not in the real Runtime, but useful for debugging.
-  - xterm
-
-  # Not in the real Runtime, but xz is a basic tool
-  - xz-utils
-
-  # In the real Runtime, although it apparently doesn't work
-  - zenity
+  - steamrt-container
 
 post_script: |
   ln -s /usr/libexec/flatpak-xdg-utils/xdg-email /usr/bin/
@@ -270,8 +44,7 @@ platform:
 
 sdk:
   add_packages_multiarch:
-    - libopus-dev
-    - libopusfile-dev
+    - steamrt-libdevel
 
   # Not adding these to the SDK for now to get a baseline for what's
   # needed for a self-contained image