Hello,

I tried to build using the current upstream release channel (see below)
but I'm still stuck.

Giovanni Biscuolo <g@xelera.eu> writes:

[...]

> The problem is that
> http://download.icu-project.org/files/icu4c/64.2/icu4c-64_2-src.tgz
> moved pernamently:
>
> --8<---------------cut here---------------start------------->8---
>
> ~$ curl -I http://download.icu-project.org/files/icu4c/64.2/icu4c-64_2-src.tgz
> HTTP/1.1 301 Moved Permanently
> Date: Thu, 02 Jul 2020 12:27:32 GMT
> Server: Apache/2.4.38 (Debian)
> Content-Security-Policy: upgrade-insecure-requests;
> Location: https://icu-project.org/files/icu4c/64.2/icu4c-64_2-src.tgz
> Content-Type: text/html; charset=iso-8859-1
>
> --8<---------------cut here---------------end--------------->8---

... AND:

--8<---------------cut here---------------start------------->8---

~$ curl -I https://icu-project.org/files/icu4c/64.2/icu4c-64_2-src.tgz
HTTP/1.1 302 Found
Date: Thu, 02 Jul 2020 12:51:46 GMT
Server: Apache/2.4.38 (Debian)
Content-Security-Policy: upgrade-insecure-requests;
Location: http://site.icu-project.org/download/#/icu4c/64.2/icu4c-64_2-src.tgz
Content-Type: text/html; charset=iso-8859-1

--8<---------------cut here---------------end--------------->8---

so I got the source URL from the new releases official channel, and
built using:

--8<---------------cut here---------------start------------->8---

~$ guix build icu4c --with-source=https://github.com/unicode-org/icu/releases/download/release-64-2/icu4c-64_2-src.tgz
[...]
successfully built /gnu/store/waf07n3970nz183kvk947lpa1wj9ixvk-icu4c-64_2-src.drv
/gnu/store/8fxpn9b21gf782n6v6cq4q17jcfgm9ix-icu4c-64_2-src

--8<---------------cut here---------------end--------------->8---

After this, unfortunately, `guix pull` is still trying to build icu4c
since it is a different store item:

--8<---------------cut here---------------start------------->8---

building /gnu/store/4582v7day5c4v9qaidlkwmd6kllks2y4-icu4c-64_2-src.tgz.drv...
downloading from http://download.icu-project.org/files/icu4c/64.2/icu4c-64_2-src.tgz...
/sha256 hash mismatch for /gnu/store/0zh5mvhgcx0198k7j6p5pgrc5krgxyqj-icu4c-64_2-src.tgz:
  expected hash: 0v0xsf14xwlj125y9fd8lrhsaych4d8liv8gr746zng6g225szb2
  actual hash:   19pfpqg5yl86nnzfkzkgq521y56wg1yhfiyis7m480rczyiqnbin
hash mismatch for store item '/gnu/store/0zh5mvhgcx0198k7j6p5pgrc5krgxyqj-icu4c-64_2-src.tgz'
build of /gnu/store/4582v7day5c4v9qaidlkwmd6kllks2y4-icu4c-64_2-src.tgz.drv failed

--8<---------------cut here---------------end--------------->8---

[...]

I still don't know how to solve this situation.

Any hint please?

Thanks! Gio'

-- 
Giovanni Biscuolo

Xelera IT Infrastructures