建议做如下变更，更加规范，现有写法假定在原地打包，设置BUILDDIR后就会报错

diff --git a/PKGBUILD b/PKGBUILD
index dabeec8..8efb7b5 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -20,15 +20,17 @@ depends=(
     'kde-cli-tools'
 )
 makedepends=('libarchive')
-source=("${pkgname}_${pkgver}_amd64.deb::https://github.com/YUCLing/open-orpheus/releases/download/v${pkgver}/${pkgname}_${pkgver}_amd64.deb")
-sha256sums=('7df411004d17b6d92ab4f5dcc3a70fe44001480813f2365198316cfa42e55c78')
+source=("${pkgname}_${pkgver}_amd64.deb::https://github.com/YUCLing/open-orpheus/releases/download/v${pkgver}/${pkgname}_${pkgver}_amd64.deb"
+       "LICENSE"
+       )
+sha256sums=('7df411004d17b6d92ab4f5dcc3a70fe44001480813f2365198316cfa42e55c78'
+           '4499595d653b7a9e65001bb09239e6fb5d33e650d1f9db808ce87905021e9ff8')

 prepare() {
     ar x ${pkgname}_${pkgver}_amd64.deb
 }

 package() {
-    cd ${srcdir}
     bsdtar -xf data.tar.zst -C ${pkgdir} --no-same-owner
-    install -Dm644 ../LICENSE "${pkgdir}/usr/share/licenses/%{pkgname}/LICENSE"
+    install -Dm644 LICENSE "${pkgdir}/usr/share/licenses/%{pkgname}/LICENSE"
 }

The original deb package uses kde-cli-tools | kde-runtime | trash-cli | libglib2.0-bin | gvfs-bin to provide trash feature, but pacman does not provide this "or" semantics. I think one of those alternative package available is fine. Because the author are using KDE, I'd just assume that all users are using KDE.

I don't know what will happen if remove these thing provides trash feature. I guess it just a small feature.

Is there a way to exclude the kde-cli-tools dependency