gnu: r-cytolib: Fix r-rhdf5libs linking.

* gnu/packages/bioconductor.scm (r-cytolib): [arguments]: Avoid to have a
plain directory on the list of libraries to link.

Co-authored-by: Ricardo Wurmus <reka@elephly.net>.

gnu/packages/bioconductor.scm

@@ -6009,6 +6009,17 @@ cluster count and membership by stability evidence in unsupervised analysis.")
          "1wylzps7wbvm64k62w5bbi8l74gaqca96psfapxfg6mcac5yz4qw"))))
     (properties `((upstream-name . "cytolib")))
     (build-system r-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'fix-linking
+           (lambda _
+             (substitute* "src/Makevars.in"
+               ;; This is to avoid having a plain directory on the list of
+               ;; libraries to link.
+               (("\\(RHDF5_LIBS\\)" match)
+                (string-append match "/libhdf5.a")))
+             #t)))))
     (inputs
      `(("zlib" ,zlib)))
     (native-inputs