diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 2c927c7408c1..06fb1bb8157c 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -386,6 +386,11 @@ let
 
   packagesWithBuildInputs = {
     # sort -t '=' -k 2
+    gam = lib.optionals stdenv.isDarwin [ pkgs.libiconv ];
+    quantreg = lib.optionals stdenv.isDarwin [ pkgs.libiconv ];
+    rmutil = lib.optionals stdenv.isDarwin [ pkgs.libiconv ];
+    robustbase = lib.optionals stdenv.isDarwin [ pkgs.libiconv ];
+    SparseM = lib.optionals stdenv.isDarwin [ pkgs.libiconv ];
     svKomodo = [ pkgs.which ];
     nat = [ pkgs.which ];
     nat_templatebrains = [ pkgs.which ];