diff -up prosody-0.11.5/configure.lua54 prosody-0.11.5/configure
--- prosody-0.11.5/configure.lua54	2020-06-30 15:47:57.575906862 -0400
+++ prosody-0.11.5/configure	2020-06-30 15:50:52.970509696 -0400
@@ -44,7 +44,7 @@ Configure $APP_NAME prior to building.
                             Default is \$PREFIX/lib
 --datadir=DIR               Location where the server data should be stored.
                             Default is \$PREFIX/var/lib/$APP_DIRNAME
---lua-version=VERSION       Use specific Lua version: 5.1, 5.2, or 5.3
+--lua-version=VERSION       Use specific Lua version: 5.1, 5.2, 5.3, or 5.4
                             Default is auto-detected.
 --lua-suffix=SUFFIX         Versioning suffix to use in Lua filenames.
                             Default is "$LUA_SUFFIX" (lua$LUA_SUFFIX...)
@@ -237,7 +237,7 @@ do
    --lua-version|--with-lua-version)
       [ -n "$value" ] || die "Missing value in flag $key."
       LUA_VERSION="$value"
-      [ "$LUA_VERSION" = "5.1" ] || [ "$LUA_VERSION" = "5.2" ] || [ "$LUA_VERSION" = "5.3" ] || die "Invalid Lua version in flag $key."
+      [ "$LUA_VERSION" = "5.1" ] || [ "$LUA_VERSION" = "5.2" ] || [ "$LUA_VERSION" = "5.3" ] || [ "$LUA_VERSION" = "5.4" ] || die "Invalid Lua version in flag $key."
       LUA_VERSION_SET=yes
       ;;
    --with-lua)
@@ -340,7 +340,7 @@ then
 fi
 
 detect_lua_version() {
-   detected_lua=$("$1" -e 'print(_VERSION:match(" (5%.[123])$"))' 2> /dev/null)
+   detected_lua=$("$1" -e 'print(_VERSION:match(" (5%.[1234])$"))' 2> /dev/null)
    if [ "$detected_lua" != "nil" ]
    then
       if [ "$LUA_VERSION_SET" != "yes" ]
@@ -403,8 +403,11 @@ then
    elif [ "$LUA_VERSION_SET" = "yes" ] && [ "$LUA_VERSION" = "5.3" ]
    then
       suffixes="5.3 53 -5.3 -53"
+   elif [ "$LUA_VERSION_SET" = "yes" ] && [ "$LUA_VERSION" = "5.4" ]
+   then
+      suffixes="5.4 54 -5.4 -54"
    else
-      suffixes="5.1 51 -5.1 -51 5.2 52 -5.2 -52 5.3 53 -5.3 -53"
+      suffixes="5.1 51 -5.1 -51 5.2 52 -5.2 -52 5.3 53 -5.3 -53 5.4 54 -5.4 -54"
    fi
    for suffix in "" $suffixes
    do