diff --git a/pkgs/by-name/li/lib60870/package.nix b/pkgs/by-name/li/lib60870/package.nix
index f5c744e71098..9d8e959b9913 100644
--- a/pkgs/by-name/li/lib60870/package.nix
+++ b/pkgs/by-name/li/lib60870/package.nix
@@ -17,12 +17,12 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-9o+gWQbpCJb+UZzPNmzGqpWD0QbGjg41is/f1POUEQs=";
   };
 
+  sourceRoot = "${finalAttrs.src.name}/lib60870-C";
+
   separateDebugInfo = true;
 
   nativeBuildInputs = [ cmake ];
 
-  preConfigure = "cd lib60870-C";
-
   passthru.updateScript = gitUpdater { rev-prefix = "v"; };
 
   meta = with lib; {
@@ -30,6 +30,6 @@ stdenv.mkDerivation (finalAttrs: {
     homepage = "https://libiec61850.com/";
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ stv0g ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
   };
 })
diff --git a/pkgs/by-name/li/libiec61850/package.nix b/pkgs/by-name/li/libiec61850/package.nix
index c5e85c462bb3..ccbf571bba29 100644
--- a/pkgs/by-name/li/libiec61850/package.nix
+++ b/pkgs/by-name/li/libiec61850/package.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation (finalAttrs: {
     homepage = "https://libiec61850.com/";
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ stv0g ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
   };
 })