sbcl: Set compiler before adding compiler dependency

Closes: https://trac.macports.org/ticket/74202

lang/sbcl/Portfile

@@ -111,6 +111,13 @@ post-patch {
     }
 }
 
+# <https://trac.macports.org/ticket/72571> notes need for explicit compiler macos-13 (Ventura)
+# TODO:  get more testing coverage for what exactly works on macos-13
+platform darwin 22 {
+    depends_build-append   port:clang-18
+    configure.compiler     macports-clang-18
+}
+
 # SBCL records used compiler inside lib/sbcl/sbcl.mk which may lead to not working sb-grovel
 if { [string match macports-clang-* ${configure.compiler}] } {
     depends_run-append \
@@ -130,13 +137,6 @@ pre-build {
     close ${sbclrc}
 }
 
-# <https://trac.macports.org/ticket/72571> notes need for explicit compiler macos-13 (Ventura)
-# TODO:  get more testing coverage for what exactly works on macos-13
-if {${os.platform} eq "darwin" && ${macos_version_major} == 13} {
-    depends_build-append   port:clang-18
-    configure.compiler     macports-clang-18        
-}
-
 build.env-append \
                 CC=${configure.cc} \
                 CXX=${configure.cxx} \