urweb: fix build with gcc15; migrate to by-name (#512673)

pkgs/by-name/ur/urweb/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchurl,
+  fetchpatch,
   file,
   openssl,
   mlton,
@@ -21,6 +22,13 @@ stdenv.mkDerivation rec {
     sha256 = "0qh6wcxfk5kf735i5gqwnkdirnnmqhnnpkfz96gz144dgz2i0c5c";
   };
 
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/urweb/urweb/commit/f7a38a95bee9d1aaf7ed83a651cfbce8da96ed44.patch";
+      sha256 = "TQFD9Y8OEOSFv6cqpHQ4WSNAPzl82MmVCAxLR4F4Uxc=";
+    })
+  ];
+
   buildInputs = [
     openssl
     mlton
@@ -47,6 +55,10 @@ stdenv.mkDerivation rec {
                    -L${libmysqlclient}/lib \
                    -L${libpq}/lib \
                    -L${sqlite.out}/lib";
+  ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
+    # unresolved reference when linking liburweb.1.dylib
+    export LDFLAGS="-Wl,-undefined,dynamic_lookup";
   '';
 
   env.NIX_CFLAGS_COMPILE = toString [

pkgs/top-level/all-packages.nix

@@ -4608,10 +4608,6 @@ with pkgs;
     stdenv = gcc14Stdenv;
   };
 
-  urweb = callPackage ../development/compilers/urweb {
-    icu = icu67;
-  };
-
   vcard = python3Packages.toPythonApplication python3Packages.vcard;
 
   inherit (callPackage ../development/compilers/vala { })