diff --git a/gnu/packages/bioconductor.scm b/gnu/packages/bioconductor.scm
index 469f2897ae..c1da8ac106 100644
--- a/gnu/packages/bioconductor.scm
+++ b/gnu/packages/bioconductor.scm
@@ -694,6 +694,34 @@ (define-public r-illuminahumanmethylationepicmanifest
      "This is a manifest package for Illumina's EPIC methylation arrays.")
     (license license:artistic2.0)))
 
+;; This is a CRAN package, but it depends on r-bsgenome-hsapiens-ucsc-hg19
+;; from Bioconductor.
+(define-public r-deconstructsigs
+  (package
+    (name "r-deconstructsigs")
+    (version "1.8.0")
+    (source (origin
+              (method url-fetch)
+              (uri (cran-uri "deconstructSigs" version))
+              (sha256
+               (base32
+                "014x0nb23jb98666kaav2phkvmkr38pi38jv0dqd4jv7zp0gdf1a"))))
+    (properties
+     `((upstream-name . "deconstructSigs")))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-bsgenome" ,r-bsgenome)
+       ("r-bsgenome-hsapiens-ucsc-hg19" ,r-bsgenome-hsapiens-ucsc-hg19)
+       ("r-genomeinfodb" ,r-genomeinfodb)
+       ("r-reshape2" ,r-reshape2)))
+    (home-page "https://github.com/raerose01/deconstructSigs")
+    (synopsis "Identifies signatures present in a tumor sample")
+    (description "This package takes sample information in the form of the
+fraction of mutations in each of 96 trinucleotide contexts and identifies
+the weighted combination of published signatures that, when summed, most
+closely reconstructs the mutational profile.")
+    (license license:gpl2+)))
+
 (define-public r-do-db
   (package
     (name "r-do-db")