diff --git a/lib/modules/fileSystems/btrfs.nix b/lib/modules/fileSystems/btrfs.nix
index 82dca6d1..ab12f7e3 100644
--- a/lib/modules/fileSystems/btrfs.nix
+++ b/lib/modules/fileSystems/btrfs.nix
@@ -67,7 +67,7 @@ in
             builtins.map
               (
                 _: builtins.concatStringsSep " " (
-                  [ "mkfs.btrfs" ] ++
+                  [ "mkfs.btrfs" "--force" ] ++
                   (lib.optionals (_.metadataProfile != null) [ "--metadata" "${_.metadataProfile}" ]) ++
                   (lib.optionals (_.dataProfile != null) [ "--data" "${_.dataProfile}" ]) ++
                   (lib.optionals (_.label != null) [ "--label" "${_.label}" ]) ++
diff --git a/lib/modules/fileSystems/disks.nix b/lib/modules/fileSystems/disks.nix
index 82bf9f51..03b51e4c 100644
--- a/lib/modules/fileSystems/disks.nix
+++ b/lib/modules/fileSystems/disks.nix
@@ -132,7 +132,7 @@ let
 
                   formatScripts = {
                     ${fs.ext4} = "mkfs.ext4 -F ${partVar}";
-                    ${fs.btrfs} = "mkfs.btrfs ${partVar}";
+                    ${fs.btrfs} = "mkfs.btrfs --force ${partVar}";
                     ${fs.swap} = "mkswap ${partVar}";
                     ${fs.ntfs} = "mkfs.ntfs -F ${partVar}";
                     ${fs.fat32} = "mkfs.fat -F 32 ${partVar}";