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-rw-r--r--gnu/packages/bioinformatics.scm2
1 files changed, 1 insertions, 1 deletions
diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index 232c7db838..477ad60f71 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -1454,7 +1454,7 @@ multiple sequence alignments.")
                       (getenv "PYTHONPATH")
                       ":" (getcwd) "/build/"
                       (car (scandir "build"
-                                    (compose not (cut string-prefix? "." <>))))))
+                                    (negate (cut string-prefix? "." <>))))))
              ;; Step out of source dir so python does not import from CWD.
              (with-directory-excursion "tests"
                (setenv "HOME" "/tmp")