The Debian maintainers aren't using these rules, so enable dynamic loading of shared libraries by default for the Steam Linux Runtime

debian/rules

@@ -4,9 +4,12 @@ DEB_HOST_ARCH_CPU ?= $(shell dpkg-architecture -qDEB_HOST_ARCH_CPU)
 DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
 
 confflags = --disable-rpath --disable-video-directfb \
-            --disable-nas --disable-esd --disable-arts \
-            --disable-alsa-shared --disable-pulseaudio-shared \
-            --disable-x11-shared
+            --disable-nas --disable-esd --disable-arts
+
+# These flags can be used to create a package with runtime dependencies
+#            --disable-alsa-shared \
+#            --disable-pulseaudio-shared \
+#            --disable-x11-shared
 
 %:
 	dh $@ --parallel