diff --git a/pkgs/tools/backup/borg/default.nix b/pkgs/tools/backup/borg/default.nix
index 9649e35c074b..911819f48aae 100644
--- a/pkgs/tools/backup/borg/default.nix
+++ b/pkgs/tools/backup/borg/default.nix
@@ -23,7 +23,7 @@ python3Packages.buildPythonApplication rec {
 
   preConfigure = ''
     export BORG_OPENSSL_PREFIX="${openssl.dev}"
-    export BORG_LZ4_PREFIX="${lz4}"
+    export BORG_LZ4_PREFIX="${lz4.dev}"
   '';
 
   postInstall = ''