diff --git a/pkgs/servers/geospatial/mapcache/default.nix b/pkgs/servers/geospatial/mapcache/default.nix
index 3eae9c2b33cb..781edfce98c8 100644
--- a/pkgs/servers/geospatial/mapcache/default.nix
+++ b/pkgs/servers/geospatial/mapcache/default.nix
@@ -5,13 +5,13 @@
 
 stdenv.mkDerivation rec {
   pname = "mapcache";
-  version = "1.12.1";
+  version = "1.14.0";
 
   src = fetchFromGitHub {
     owner = "MapServer";
     repo = pname;
     rev = "rel-${lib.replaceStrings [ "." ] [ "-" ] version}";
-    sha256 = "sha256-NuiZMWcmsN5wDCd37Hvj3cazwT3Ea+OknV/YR3urZB0=";
+    sha256 = "sha256-+QP4xXhP+MNqnhMUtMdtKrcuJ0M2BXWu3mbxXzj5ybc=";
   };
 
   nativeBuildInputs = [
@@ -48,6 +48,8 @@ stdenv.mkDerivation rec {
     "-DAPACHE_MODULE_DIR=${placeholder "out"}/modules"
   ];
 
+  NIX_CFLAGS_COMPILE = "-std=c99";
+
   meta = with lib; {
     description = "A server that implements tile caching to speed up access to WMS layers";
     homepage = "https://mapserver.org/mapcache/";