DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 5BHCpsMY1265021
Authentication-Results: delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com
Authentication-Results: delorie.com; spf=pass smtp.mailfrom=cygwin.com
DKIM-Filter: OpenDKIM Filter v2.11.0 delorie.com 5BHCpsMY1265021
Authentication-Results: delorie.com;
	dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=Lg0Hza0S
X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D0EB54BA2E20
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1765975913;
	bh=wyNTZ7VK9mK806CHbjgE8QVE+roXdzt4SbujxYk+Ggs=;
	h=Date:Subject:To:References:In-Reply-To:List-Id:List-Unsubscribe:
	 List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	 From;
	b=Lg0Hza0Stw3ndVrhDaKDyQ7YE+ccDqeXq+lBAj1Uyv20vWu8ZCgDQxVexKoIjiBkg
	 JRKSWvyu6XN9fHK58WUJv19UEHrzBFx9k4QcCdA0fe9ExI0pqc44x7tdt6KNe0v5y5
	 l1T8VI+NNrA+/dTNxFc1Vvt2HpcmIFQf2iKTbEkg=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 6ECAD4BA2E24
ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 6ECAD4BA2E24
ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1765975849; cv=none;
 b=Cp+bFEzibPxCu9ls20+dV+Kn+ZzBiB8JjpNF46TmZ1gNkTWi6CBG9SaV6YsEOGv9R6BAPNhBMrekTeofFnGS/wPlwCL0G2pqJh/0jwvgNZyJujQPxW4K8WiuZ0+0H9Rne23WTA8CB0/OTMnEP9fS4hWvfNS9T5FBwmyKkK8w+O0=
ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key;
 t=1765975849; c=relaxed/simple;
 bh=mSJEcvsBU9JxwLGl3wCEPWPLqUK/ntp7bGoB2ux7b0c=;
 h=Message-ID:Date:MIME-Version:Subject:To:From;
 b=ayF8o7z0EhYF6imWC0zosKgL1VUNNf8QgaV5oIGXrxvjXA3W9n4zF/Knt9LWwMeCV6GO3kxz/Oobh8H+bN8mFqeIyaQZl8BCvYFtKdePv+bGXLr48qA17etMgd+V7Iht3QKrjQf7sgkmz7gWW8whABHzB0/Mbv8CiVpFTyvdlZs=
ARC-Authentication-Results: i=1; server2.sourceware.org
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 6ECAD4BA2E24
X-SNCR-Rigid: 693FF8BE0038FF48
X-Originating-IP: [86.143.185.36]
X-OWM-Source-IP: 86.143.185.36
X-OWM-Env-Sender: jon DOT turney AT dronecode DOT org DOT uk
X-RazorGate-Vade: gggruggvucftvghtrhhoucdtuddrgeefgedrtddtgdegvdeiudcutefuodetggdotefrodftvfcurfhrohhfihhlvgemuceutffkvffkuffjvffgnffgvefqofdpqfgfvfenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhepkfffgggfuffvfhfhjggtgfesthejredttddvjeenucfhrhhomheplfhonhcuvfhurhhnvgihuceojhhonhdrthhurhhnvgihsegurhhonhgvtghouggvrdhorhhgrdhukheqnecuggftrfgrthhtvghrnhepvddvueehffeuvddthfevkeeifedvhfefteffvdduheekieegtedvteejteeiieelnecukfhppeekiedrudegfedrudekhedrfeeinecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehhvghloheplgduledvrdduieekrddurddutdelngdpihhnvghtpeekiedrudegfedrudekhedrfeeipdhmrghilhhfrhhomhepjhhonhdrthhurhhnvgihsegurhhonhgvtghouggvrdhorhhgrdhukhdprhgvvhfkrfephhhoshhtkeeiqddugeefqddukeehqdefiedrrhgrnhhgvgekiedqudegfedrsghttggvnhhtrhgrlhhplhhushdrtghomhdprghuthhhpghushgvrhepjhhonhhtuhhrnhgvhiessghtihhnthgvrhhnvghtrdgtohhmpdhgvghokffrpefiuedpoffvtefjohhsthepsghtphhrughrghhotddtjedpnhgspghrtghpthhtohepvddprhgtphhtthhopegthihgfihinhestgihghifihhnrdgtohhmpdhr
 tghpthhtoheprhhonhgrnhdrlhgvghgrlhhlihgtsehnrghgrhgrrdgtohhm
X-RazorGate-Vade-Verdict: clean 0
X-RazorGate-Vade-Classification: clean
X-VadeSecure-score: verdict=clean score=0/300, class=clean
Message-ID: <1967c510-9c76-4bd8-8538-81cc0dfdaea4@dronecode.org.uk>
Date: Wed, 17 Dec 2025 12:50:44 +0000
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: Cyclic dependency prevents installation of python39 (also python3)
To: Ronan Le Gallic <ronan DOT legallic AT nagra DOT com>,
        The Cygwin Mailing List <cygwin AT cygwin DOT com>
References: <GV0P278MB0388052BFCB5E11C92D617C799AAA AT GV0P278MB0388 DOT CHEP278 DOT PROD DOT OUTLOOK DOT COM>
 <46600672-15b5-4084-8995-ae4cac78bde6 AT dronecode DOT org DOT uk>
 <GV0P278MB0388E5459882062B7C6183A199AAA AT GV0P278MB0388 DOT CHEP278 DOT PROD DOT OUTLOOK DOT COM>
Content-Language: en-US
In-Reply-To: <GV0P278MB0388E5459882062B7C6183A199AAA@GV0P278MB0388.CHEP278.PROD.OUTLOOK.COM>
X-BeenThere: cygwin AT cygwin DOT com
X-Mailman-Version: 2.1.30
Precedence: list
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe: <https://cygwin.com/mailman/options/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From: Jon Turney via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Errors-To: cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

On 16/12/2025 16:35, Ronan Le Gallic wrote:
> 
> Regarding the installation of python3/python39:
> - I have also performed this test, obtaining the same result.

Can you share the full log for the simplest case, trying to install 
python39?

Can you share your /etc/installed.db (the list of packages you already 
have installed)

> 
> Regarding the type of installation:
> - This is an addition to the existing installation.
> 
> Regarding the update of the .ini file:
> - As I am working within an isolated network, this simply involves modifying the file in the local repository.
> 
> ==> I will therefore concentrate my analysis on the distinction between online and offline installation and will revert to you as necessary.

Thanks for continuing to investigate this mystery!

Please follow up to the cygwin mailing list, not me personally.


-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple