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-rw-r--r--pkgs/servers/osrm-backend/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/servers/osrm-backend/default.nix b/pkgs/servers/osrm-backend/default.nix
index cddda5d399f..77d30ff4ffa 100644
--- a/pkgs/servers/osrm-backend/default.nix
+++ b/pkgs/servers/osrm-backend/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ bzip2 libxml2 libzip boost lua luabind tbb expat ];
 
-  NIX_CFLAGS_COMPILE = [
+  NIX_CFLAGS_COMPILE = toString [
     # Needed with GCC 12
     "-Wno-error=stringop-overflow"
     "-Wno-error=uninitialized"