diff --git a/pkgs/by-name/ou/ouch/package.nix b/pkgs/by-name/ou/ouch/package.nix
index 539f64907e9b..f3574b3d23a1 100644
--- a/pkgs/by-name/ou/ouch/package.nix
+++ b/pkgs/by-name/ou/ouch/package.nix
@@ -10,6 +10,10 @@
   git,
   zlib,
   zstd,
+
+  # RAR code is under non-free unRAR license
+  # see the meta.license section below for more details
+  enableUnfree ? false,
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -44,7 +48,17 @@ rustPlatform.buildRustPackage rec {
     zstd
   ];
 
-  buildFeatures = [ "zstd/pkg-config" ];
+  buildNoDefaultFeatures = true;
+  buildFeatures =
+    [
+      "use_zlib"
+      "use_zstd_thin"
+      # "bzip3" will be optional in the next version
+      "zstd/pkg-config"
+    ]
+    ++ lib.optionals enableUnfree [
+      "unrar"
+    ];
 
   postInstall = ''
     installManPage artifacts/*.1
@@ -57,7 +71,7 @@ rustPlatform.buildRustPackage rec {
     description = "Command-line utility for easily compressing and decompressing files and directories";
     homepage = "https://github.com/ouch-org/ouch";
     changelog = "https://github.com/ouch-org/ouch/blob/${version}/CHANGELOG.md";
-    license = lib.licenses.mit;
+    license = with lib.licenses; [ mit ] ++ lib.optionals enableUnfree [ unfreeRedistributable ];
     maintainers = with lib.maintainers; [
       figsoda
       psibi