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-rw-r--r--pkgs/applications/misc/tilemaker/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/misc/tilemaker/default.nix b/pkgs/applications/misc/tilemaker/default.nix
index dd05604501e..90d7aa48750 100644
--- a/pkgs/applications/misc/tilemaker/default.nix
+++ b/pkgs/applications/misc/tilemaker/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = lib.optional (stdenv.hostPlatform != stdenv.buildPlatform)
     "-DPROTOBUF_PROTOC_EXECUTABLE=${buildPackages.protobuf}/bin/protoc";
 
-  NIX_CFLAGS_COMPILE = [ "-DTM_VERSION=${finalAttrs.version}" ];
+  NIX_CFLAGS_COMPILE = toString [ "-DTM_VERSION=${finalAttrs.version}" ];
 
   postInstall = ''
     installManPage ../docs/man/tilemaker.1