diff --git a/.gitignore b/.gitignore
index af65343..d4ad714 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@ __pycache__/
 *.egg-info/
 *.gguf
 *.log
+*.exe
 log.txt
 .venv/
 .env
diff --git a/packaging/build.spec b/packaging/build.spec
index c5d0423..b44ad42 100644
--- a/packaging/build.spec
+++ b/packaging/build.spec
@@ -69,6 +69,49 @@ a = Analysis(  # noqa: F821
     excludes=[],
     noarchive=False,
 )
+
+# PyInstaller's own dependency walker separately discovers cublas64_13.dll
+# and cublasLt64_13.dll (ggml-cuda.dll imports them directly) and stages its
+# own copy at the bundle root, on top of the copy the `binaries` list above
+# already places in llama_cpp/lib/ (which is where they need to be, next to
+# ggml-cuda.dll, for ITS dependency lookup to find them - see the comment
+# above). The root copy is pure duplication: nothing loads cublas from
+# there. Drop it - it's ~547MB.
+_DUPLICATED_AT_ROOT = {"cublas64_13.dll", "cublasLt64_13.dll"}
+a.binaries = [
+    entry
+    for entry in a.binaries
+    if not (Path(entry[0]).name in _DUPLICATED_AT_ROOT and Path(entry[0]).parent == Path("."))
+]
+
+# Qt/PyQt6 features this app doesn't use, bundled defensively by PyQt6's
+# PyInstaller hook. Confirmed safe to drop: Qt6Widgets/Qt6Gui/Qt6Core don't
+# link any of these at the DLL level (only load them on demand), no
+# PyQt6.QtNetwork/QtSvg/QtPdf Python module is bundled or imported anywhere
+# in this app, no QTranslator is ever installed, and app.setStyle("Fusion")
+# in gui.py forces a style that's built into Qt6Widgets itself rather than
+# loaded from the styles/ plugin.
+_UNUSED_QT_BASENAMES = {
+    "opengl32sw.dll",  # software OpenGL fallback; no QOpenGLWidget/3D used
+    "qt6pdf.dll",
+    "qt6network.dll",
+    "qt6svg.dll",
+    "qsvg.dll",  # imageformats SVG plugin
+    "qsvgicon.dll",  # iconengines SVG plugin
+    "qpdf.dll",  # imageformats PDF plugin (depends on the Qt6Pdf.dll dropped above)
+    "qmodernwindowsstyle.dll",  # styles plugin; app always forces Fusion
+}
+
+
+def _is_unused_qt_binary(dest: str) -> bool:
+    return Path(dest).name.lower() in _UNUSED_QT_BASENAMES
+
+
+a.binaries = [entry for entry in a.binaries if not _is_unused_qt_binary(entry[0])]
+# Qt's .qm translation files ship as data, not binaries - this app never
+# installs a QTranslator, so none of the 96 bundled languages are ever used.
+a.datas = [entry for entry in a.datas if not str(entry[0]).lower().endswith(".qm")]
+
 pyz = PYZ(a.pure)  # noqa: F821
 
 exe = EXE(  # noqa: F821