diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index 6a9f13bdc6..139828111a 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -4846,6 +4846,7 @@ (define-public seek
                 (uri (hg-reference
                       (url "https://bitbucket.org/libsleipnir/sleipnir")
                       (changeset changeset)))
+                (file-name (string-append name "-" version "-checkout"))
                 (sha256
                  (base32
                   "0qrvilwh18dpbhkf92qvxbmay0j75ra3jg2wrhz67gf538zzphsx"))))