1 files changed, 23 insertions, 0 deletions
diff --git a/pkgs/os-specific/bsd/freebsd/pkgs/filterSource.nix b/pkgs/os-specific/bsd/freebsd/pkgs/filterSource.nix
new file mode 100644
index 0000000000000..dc215c18aecb7
--- /dev/null
+++ b/pkgs/os-specific/bsd/freebsd/pkgs/filterSource.nix
@@ -0,0 +1,23 @@
+{
+  lib,
+  pkgsBuildBuild,
+  runCommand,
+  writeText,
+  source,
+}:
+
+{
+  pname,
+  path,
+  extraPaths ? [ ],
+}:
+
+let
+  sortedPaths = lib.naturalSort ([ path ] ++ extraPaths);
+  filterText = writeText "${pname}-src-include" (
+    lib.concatMapStringsSep "\n" (path: "/${path}") sortedPaths
+  );
+in
+runCommand "${pname}-filtered-src" { nativeBuildInputs = [ pkgsBuildBuild.rsync ]; } ''
+  rsync -a -r --files-from=${filterText} ${source}/ $out
+''