--- _cabal_deps/blockio-0.1.1.1/blockio.cabal.orig	2026-05-07 15:43:31 UTC
+++ _cabal_deps/blockio-0.1.1.1/blockio.cabal
@@ -110,6 +110,14 @@ library
       System.FS.BlockIO.Internal
       System.FS.BlockIO.Internal.Fcntl
 
+  elif os(freebsd)
+    hs-source-dirs: src-linux
+    build-depends:  unix ^>=2.8.4
+    other-modules:
+      System.FS.BlockIO.Internal
+      System.FS.BlockIO.Internal.Fcntl
+    cpp-options: -DSERIALBLOCKIO
+
   elif os(windows)
     hs-source-dirs: src-windows
     build-depends:  Win32 ^>=2.14