During rebuilds of debian-testing, scrcpy failed to build.

Debugging this, it turns out that this is due to the fact that the
environment already had BUILD_DIR set (to "build"). However,
debian/rules expects that it is unset (indirectly):
It expects that server/build_without_gradle puts the scrcpy-server
into build_manual which it only does if BUILD_DIR is unset or set to
build_manual.

Fix:
in line 41 of debian/rules, add:
BUILD_DIR=build_manual
to the already present environment overrides.

Cheers,
Sven

We believe that the bug you reported is fixed in the latest version of
scrcpy, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1013304@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Yangfl <mmyangfl@gmail.com> (supplier of updated scrcpy package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sat, 16 Jul 2022 17:47:57 +0800
Source: scrcpy
Architecture: source
Version: 1.24-1
Distribution: unstable
Urgency: medium
Maintainer: Yangfl <mmyangfl@gmail.com>
Changed-By: Yangfl <mmyangfl@gmail.com>
Closes: 1013304
Changes:
 scrcpy (1.24-1) unstable; urgency=medium
 .
   * New upstream release
   * FTBFS if BUILD_DIR is set (Closes: #1013304)
   * Bump Standards-Version to 4.6.1
Checksums-Sha1:
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 37dcc6235909d4c6b8a552da90e236de481aa685 424970 scrcpy_1.24.orig.tar.gz
 54e4435f310b0a5338586252478a31179459f029 13992 scrcpy_1.24-1.debian.tar.xz
 3f3ca35257daf9f84682af1270ac52ee787f39d7 17303 scrcpy_1.24-1_amd64.buildinfo
Checksums-Sha256:
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Files:
 89be7b3d65fad19a353f0bc7767efa5a 2122 net optional scrcpy_1.24-1.dsc
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 1089f58dd0890484760ae7e34ec1e3b3 13992 net optional scrcpy_1.24-1.debian.tar.xz
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