diff --git a/modules/default.nix b/modules/default.nix
index 20caab2..fd335cd 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -102,6 +102,7 @@
         pkg: builtins.elem (lib.getName pkg) [
           "corefonts"
           "vista-fonts"
+          "p7zip" # exception: rar source code is not free, but available; p7zip with `enableUnfree` includes it
         ]
       );
       # Add unstable channel
diff --git a/users/simon/modules/programs.nix b/users/simon/modules/programs.nix
index b92004a..0b4f4a3 100644
--- a/users/simon/modules/programs.nix
+++ b/users/simon/modules/programs.nix
@@ -38,7 +38,7 @@
 
     # file format tools
     imagemagick # image conversion
-    p7zip # 7z cli
+    (p7zip.override { enableUnfree = true; }) # 7z cli (with rar support)
     pdftk # pdf multitool
     sqlite-interactive # cli for sqlite databses
     upx # executable packer