Hi Ricardo,

I found 2 duplicated packages with different names in bioinformatics:

this
--8<---------------cut here---------------start------------->8---
(define-public fanc
  (let ((commit "354401e52ba2320e6b1ba0d3b5aab3541d31c9f3")
	(revision "1"))
    (package
      (name "fanc")
      (version (git-version "0" revision commit))
      (source (origin
		(method git-fetch)
		(uri (git-reference
		      (url "https://github.com/vaquerizaslab/fanc.git")
		      (commit commit)))
		(file-name (git-file-name name version))
		(sha256
		 (base32
		  "0vp2cak5snla4j2q23d3ixx016bwzvxfiv4z6yp7anl0xaksd5bl"))))
...
      (home-page "https://github.com/vaquerizaslab/fanc")
      (synopsis "Framework for the analysis of C-like data")
      (description "FAN-C provides a pipeline for analysing Hi-C data starting
at mapped paired-end sequencing reads.")
      (license license:gpl3+))))
--8<---------------cut here---------------end--------------->8---

and this

--8<---------------cut here---------------start------------->8---
(define-public python-fanc
  (package
    (name "python-fanc")
    (version "0.9.25")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/vaquerizaslab/fanc")
                    ;; There are no tags.  This commit corresponds to
                    ;; version 0.9.25.
                    (commit "e2205346c13ea5349681dff21adeb271d4ea5261")))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "0rxq24p852iiayi0083fyigvc30as695rha71q6xd4s2ij1k9mqi"))))
...
    (home-page "https://github.com/vaquerizaslab/fanc")
    (synopsis "Framework for the analysis of C-data")
    (description
     "FAN-C provides a pipeline for analysing Hi-C data starting at
mapped paired-end sequencing reads.")
    (license license:gpl3+)))
--8<---------------cut here---------------end--------------->8---

Failing and took too much time on tests I've gave up on 20min :-).

--
Oleg