gnu: Add r-basilisk.

* gnu/packages/bioconductor.scm (r-basilisk): New variable.

gnu/packages/bioconductor.scm

@@ -13986,6 +13986,34 @@ eliminating obsolete caches generated by old versions of packages.")
 package, primarily for creation of the underlying Conda instance.")
     (license license:gpl3)))
 
+(define-public r-basilisk
+  (package
+    (name "r-basilisk")
+    (version "1.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (bioconductor-uri "basilisk" version))
+       (sha256
+        (base32
+         "1nzbn3f2jzvg3a3m6wgksi4cvamqas2q7csdk4ir7fcirasf536v"))))
+    (properties `((upstream-name . "basilisk")))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-basilisk-utils" ,r-basilisk-utils)
+       ("r-dir-expiry" ,r-dir-expiry)
+       ("r-reticulate" ,r-reticulate)))
+    (native-inputs `(("r-knitr" ,r-knitr)))
+    (home-page "https://bioconductor.org/packages/basilisk")
+    (synopsis "Freeze Python dependencies inside Bioconductor packages")
+    (description
+     "This package installs a self-contained Conda instance that is managed by
+the R/Bioconductor installation machinery.  This aims to provide a consistent
+Python environment that can be used reliably by Bioconductor packages.
+Functions are also provided to enable smooth interoperability of multiple
+Python environments in a single R session.")
+    (license license:gpl3)))
+
 (define-public r-tximeta
   (package
     (name "r-tximeta")