macports-ports/shells/fish3/files/patch-share_config_fish.diff

--- share/config.fish.orig
+++ share/config.fish
@@ -86,6 +86,21 @@
     set -a fish_complete_path $__fish_data_dir/completions
 end
 
+# MacPorts specific PATH setting, move ${prefix}/bin at PATH's head
+set MP_PREFIX @@PREFIX@@
+if contains $MP_PREFIX $PATH
+    set -e MP_PATH
+    for path_component in $PATH
+        if test $path_component != @@PREFIX@@
+            set MP_PATH $MP_PATH $path_component
+        end
+    end
+    set MP_PATH $MP_PREFIX $MP_PATH
+    set PATH $MP_PATH
+    set -e MP_PATH
+end
+set -e MP_PREFIX
+
 # Add a handler for when fish_user_path changes, so we can apply the same changes to PATH
 function __fish_reconstruct_path -d "Update PATH when fish_user_paths changes" --on-variable fish_user_paths
     # Deduplicate $fish_user_paths