diff --git a/bin/dialog.md b/bin/dialog.md
index ee0304cf162b9a80dd9454673e7e4f3598979568..f208ea7a03f6770f947c09f5657b13a9c950a672 100644
--- a/bin/dialog.md
+++ b/bin/dialog.md
@@ -177,10 +177,11 @@ As a last resort, it will attempt to fall back to **zenity**(1),
 
 # ENVIRONMENT
 
-`STEAM_RUNTIME`
+`STEAM_RUNTIME_SCOUT`, `STEAM_RUNTIME`
 :   If set to an absolute path to the `LD_LIBRARY_PATH`-based
     Steam Runtime 1.0 (scout), that version will be used in preference
     to the typical `~/.steam/root/ubuntu12_32/steam-runtime`.
+    `STEAM_RUNTIME_SCOUT` is preferred if both are set.
 
 `STEAM_RUNTIME_DIALOG_UI`
 :   If set to a command, attempt to use it as a higher priority than
diff --git a/bin/dialog.sh b/bin/dialog.sh
index c407efb4422fecd1fd2b11b077d2b2e2fb459037..fb1f7649b130ee66cd5cb609f5cb775cd0d87714 100755
--- a/bin/dialog.sh
+++ b/bin/dialog.sh
@@ -116,7 +116,7 @@ xterm_fallback () {
 }
 
 detect_scout_ldlp () {
-    for dir in "${1-}" ~/.steam/root/ubuntu12_32/steam-runtime; do
+    for dir in "${STEAM_RUNTIME_SCOUT-}" "${1-}" ~/.steam/root/ubuntu12_32/steam-runtime; do
         if [ -n "$dir" ] && [ -x "$dir/amd64/usr/bin/zenity" ]; then
             echo "$dir"
             return 0
@@ -389,7 +389,7 @@ main () {
     if [ -z "$is_slr" ] \
         && ldlp_runtime=$(detect_scout_ldlp "$ldlp_runtime") \
     ; then
-        debug "LDLP runtime detected"
+        debug "LDLP runtime detected at $ldlp_runtime"
 
         for program in \
             ~/.steam/root/ubuntu12_64/steam-dialog-ui \
diff --git a/bin/launch-options.sh b/bin/launch-options.sh
index 7a1d60dfc181a7b7464d2f525b2ca96ef949c3d1..df64d864b333c72c7147d81d68abb54a4d9a4d79 100755
--- a/bin/launch-options.sh
+++ b/bin/launch-options.sh
@@ -34,6 +34,8 @@ main () {
     me="${me##*/}"
 
     default_path="/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games"
+    # Intentionally not STEAM_RUNTIME_SCOUT: we want the LDLP runtime
+    # that we were previously running in, if any
     steam_runtime="${STEAM_RUNTIME-}"
 
     # Undo any weird environment before we start running external
diff --git a/bin/logger.md b/bin/logger.md
index 24665afd95ed03577ea8a9bd2cd4d8930a1f1462..4f849999732fdadc35d8069ede7b7fdfb71baeee 100644
--- a/bin/logger.md
+++ b/bin/logger.md
@@ -19,7 +19,7 @@ srt-logger - record logs
 [**--**]
 [*COMMAND* [*ARGUMENTS...*]]
 
-**source "${STEAM_RUNTIME}/usr/libexec/steam-runtime-tools-0/logger-0.bash"**
+**source "${STEAM_RUNTIME_SCOUT}/usr/libexec/steam-runtime-tools-0/logger-0.bash"**
 [*OPTIONS*]
 
 **srt-logger --mkfifo**
diff --git a/bin/urlopen.c b/bin/urlopen.c
index d2112757d43a00e2e5fdccdc8a448d922729033b..efdaba4b88486a19f1fad4c2722b06017d491e60 100644
--- a/bin/urlopen.c
+++ b/bin/urlopen.c
@@ -147,6 +147,9 @@ open_with_portal (const char *uri_or_filename,
     }
 }
 
+/*
+ * Returns: %TRUE if running inside a LD_LIBRARY_PATH runtime
+ */
 static gboolean
 is_ldlp_runtime (void)
 {
diff --git a/docs/shared-paths.md b/docs/shared-paths.md
index a4bfae1cf279a8b56f5f960f99d87efb3c5a747b..75ab290c6eb32f583b1906ea67a19499524f75ff 100644
--- a/docs/shared-paths.md
+++ b/docs/shared-paths.md
@@ -230,6 +230,7 @@ the container:
     * `/boot`
     * `/root`
 * `$STEAM_RUNTIME`
+* `$STEAM_RUNTIME_SCOUT`
 
 ## The home directory
 
diff --git a/pressure-vessel/pressure-vessel-unruntime b/pressure-vessel/pressure-vessel-unruntime
index d5857242e5a581b23e3e6ac602cba53d860e35ab..86dd9664ea9278e2d9c574409b8a6fd9c9b9ed30 100755
--- a/pressure-vessel/pressure-vessel-unruntime
+++ b/pressure-vessel/pressure-vessel-unruntime
@@ -58,6 +58,8 @@ if [ -n "${PATH-}" ]; then
     set -- "--env-if-host=PATH=$PATH" "$@"
 fi
 
+# Intentionally not STEAM_RUNTIME_SCOUT: we want the LDLP runtime
+# that we were previously running in, if any
 if [ -n "${STEAM_RUNTIME-}" ]; then
     set -- "--env-if-host=STEAM_RUNTIME=$STEAM_RUNTIME" "$@"
 fi
diff --git a/pressure-vessel/wrap-setup.c b/pressure-vessel/wrap-setup.c
index 8bac27bd7a4f445a2997de30f50b7fa90ab25ae0..2dc46ccf31c086dfbd6a450c19265a8ed4e3054c 100644
--- a/pressure-vessel/wrap-setup.c
+++ b/pressure-vessel/wrap-setup.c
@@ -1154,6 +1154,7 @@ static const EnvMount known_required_env[] =
     { "STEAM_COMPAT_TOOL_PATH", ENV_MOUNT_FLAGS_DEPRECATED },
     { "STEAM_COMPAT_TOOL_PATHS", ENV_MOUNT_FLAGS_COLON_DELIMITED },
     { "STEAM_EXTRA_COMPAT_TOOLS_PATHS", ENV_MOUNT_FLAGS_COLON_DELIMITED },
+    { "STEAM_RUNTIME_SCOUT", ENV_MOUNT_FLAGS_NONE },
     { "XDG_CACHE_HOME", ENV_MOUNT_FLAGS_IF_HOME_SHARED },
     { "XDG_CONFIG_HOME", ENV_MOUNT_FLAGS_IF_HOME_SHARED },
     { "XDG_DATA_HOME", ENV_MOUNT_FLAGS_IF_HOME_SHARED },