diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 4e5c08785f21..dd830e741934 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -8716,6 +8716,12 @@
     name = "Fábio Batista";
     keys = [ { fingerprint = "D2D8 69D8 5EEC 30AD D327  B4A5 6CD5 5257 DB01 8B72"; } ];
   };
+  FabricSoul = {
+    name = "FabricSoul";
+    github = "FabricSoul";
+    githubId = 114606360;
+    email = "fabric.soul7@gmail.com";
+  };
   fallenbagel = {
     name = "fallenbagel";
     github = "fallenbagel";
diff --git a/pkgs/by-name/xa/xadrian/package.nix b/pkgs/by-name/xa/xadrian/package.nix
new file mode 100644
index 000000000000..587f43785b94
--- /dev/null
+++ b/pkgs/by-name/xa/xadrian/package.nix
@@ -0,0 +1,111 @@
+{
+  lib,
+  stdenvNoCC,
+  fetchurl,
+  jdk8,
+  makeWrapper,
+  makeBinaryWrapper,
+  makeDesktopItem,
+  copyDesktopItems,
+  unzip,
+}:
+
+stdenvNoCC.mkDerivation (finalAttrs: {
+  pname = "xadrian";
+  version = "1.5.1";
+
+  # The source release (tag xadrian-1.5.1) cannot be built: it depends on
+  # de.ailis:oneinstance, which was only published to nexus.ailis.de (now
+  # offline) and is not on Maven Central. The upstream release instead ships
+  # prebuilt, self-contained artifacts, which we repackage here.
+  src =
+    if stdenvNoCC.hostPlatform.isDarwin then
+      fetchurl {
+        url = "https://github.com/kayahr/xadrian/releases/download/xadrian-${finalAttrs.version}/xadrian-${finalAttrs.version}-macosx.zip";
+        hash = "sha256-nCkhlC/nrTxCMd2jO+avkFlXD98a+rFvD6uoCfcZ3PU=";
+      }
+    else
+      fetchurl {
+        url = "https://github.com/kayahr/xadrian/releases/download/xadrian-${finalAttrs.version}/xadrian-${finalAttrs.version}-unix.tar.bz2";
+        hash = "sha256-MVWvYbI9V9s0CbmM6DXmWZEu0kdn9ZIpNcnJZhkDsjU=";
+      };
+
+  sourceRoot = if stdenvNoCC.hostPlatform.isDarwin then "." else "xadrian-${finalAttrs.version}";
+
+  __structuredAttrs = true;
+  strictDeps = true;
+
+  # Xadrian must run on a Java 8 runtime: it uses javax.xml.bind (JAXB), which
+  # was bundled in the JDK only through Java 8 and removed in Java 11+.
+  nativeBuildInputs = [
+    unzip
+  ]
+  # A macOS .app's CFBundleExecutable must be a real binary, so use
+  # makeBinaryWrapper on Darwin; makeWrapper's shell script is fine elsewhere.
+  ++ lib.optionals stdenvNoCC.hostPlatform.isDarwin [ makeBinaryWrapper ]
+  ++ lib.optionals (!stdenvNoCC.hostPlatform.isDarwin) [
+    makeWrapper
+    copyDesktopItems
+  ];
+
+  desktopItems = lib.optionals (!stdenvNoCC.hostPlatform.isDarwin) [
+    (makeDesktopItem {
+      name = "xadrian";
+      desktopName = "Xadrian";
+      exec = "xadrian";
+      icon = "xadrian";
+      comment = finalAttrs.meta.description;
+      categories = [ "Game" ];
+      startupWMClass = "Xadrian";
+    })
+  ];
+
+  installPhase = ''
+    runHook preInstall
+  ''
+  + (
+    if stdenvNoCC.hostPlatform.isDarwin then
+      ''
+        mkdir -p $out/Applications
+        cp -R Xadrian.app $out/Applications/
+        appdir=$out/Applications/Xadrian.app
+        chmod -R u+w "$appdir"
+
+        # The bundled JavaApplicationStub is Apple's long-removed Java 6
+        # launcher (no arm64, broken on modern macOS); replace it with a JRE
+        # wrapper so the .app actually launches.
+        rm -f "$appdir/Contents/MacOS/JavaApplicationStub"
+        makeWrapper ${jdk8}/bin/java "$appdir/Contents/MacOS/JavaApplicationStub" \
+          --add-flags "-jar $appdir/Contents/Resources/Java/xadrian.jar"
+
+        makeWrapper ${jdk8}/bin/java $out/bin/xadrian \
+          --add-flags "-jar $appdir/Contents/Resources/Java/xadrian.jar"
+      ''
+    else
+      ''
+        # Keep the jars co-located so xadrian.jar's relative Class-Path resolves.
+        install -Dm644 -t $out/share/xadrian lib/*.jar
+
+        # The application icon is embedded in the jar.
+        unzip -p $out/share/xadrian/xadrian.jar de/ailis/xadrian/images/xadrian-64.png \
+          > xadrian.png
+        install -Dm644 xadrian.png $out/share/icons/hicolor/64x64/apps/xadrian.png
+
+        makeWrapper ${jdk8}/bin/java $out/bin/xadrian \
+          --add-flags "-jar $out/share/xadrian/xadrian.jar"
+      ''
+  )
+  + ''
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "Factory complex calculator for X3: Terran Conflict and X3: Albion Prelude";
+    homepage = "https://github.com/kayahr/xadrian";
+    license = lib.licenses.mit;
+    sourceProvenance = with lib.sourceTypes; [ binaryBytecode ];
+    maintainers = with lib.maintainers; [ FabricSoul ];
+    mainProgram = "xadrian";
+    platforms = jdk8.meta.platforms;
+  };
+})