diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 4cd5ac4fc361..ba0b7e8090d5 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -554,6 +554,7 @@ supported-platforms:
   password:                                     [ platforms.x86 ] # uses scrypt, which requries x86
   password-instances:                           [ platforms.x86 ] # uses scrypt, which requries x86
   reactivity:                                   [ platforms.windows ]
+  reflex-libtelnet:                             [ platforms.linux ] # pkgs.libtelnet only supports linux
   scat:                                         [ platforms.x86 ] # uses scrypt, which requries x86
   scrypt:                                       [ platforms.x86 ] # https://github.com/informatikr/scrypt/issues/8
   seqalign:                                     [ platforms.x86 ] # x86 intrinsics
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 667752e65983..833c8eaba091 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -236228,6 +236228,7 @@ self: {
        ];
        description = "Reflex bindings for libtelnet";
        license = lib.licenses.gpl3Plus;
+       platforms = lib.platforms.linux;
      }) {};
 
   "reflex-localize" = callPackage