Add r-gjam package

common/r-packages.scm

@@ -196,7 +196,7 @@
     (synopsis "Generalized Joint Attribute Modeling")
     (description
       "Analyzes joint attribute data (e.g., species abundance) that are combinations of continuous and discrete data with Gibbs sampling.  Full model and computation details are described in Clark et al. (2018) <doi:10.1002/ecm.1241>.")
-    (license gpl2+)))
+    (license license:gpl2+)))
 
 (define-public r-vcfr
   (package