diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index b2dbe9bf75..f86566a9ae 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -7197,8 +7197,7 @@ optionally compressed by gzip.")
              (let* ((out (assoc-ref outputs "out"))
                     (bin (string-append out "/bin")))
                (install-file "snap-aligner" bin)
-               (install-file "SNAPCommand" bin)
-               #t))))))
+               (install-file "SNAPCommand" bin)))))))
     (native-inputs
      `(("zlib" ,zlib)))
     (home-page "http://snap.cs.berkeley.edu/")