diff --git a/pkgs/applications/networking/p2p/eiskaltdcpp/default.nix b/pkgs/applications/networking/p2p/eiskaltdcpp/default.nix
index 60601ed56092..9e749cc96f0d 100644
--- a/pkgs/applications/networking/p2p/eiskaltdcpp/default.nix
+++ b/pkgs/applications/networking/p2p/eiskaltdcpp/default.nix
@@ -78,16 +78,16 @@ mkDerivation rec {
   '';
 
   cmakeFlags = [
-    "-DDBUS_NOTIFY=ON"
-    "-DFREE_SPACE_BAR_C=ON"
-    "-DLUA_SCRIPT=ON"
-    "-DPERL_REGEX=ON"
-    "-DUSE_ASPELL=ON"
-    "-DUSE_CLI_JSONRPC=ON"
-    "-DUSE_MINIUPNP=ON"
-    "-DUSE_JS=ON"
-    "-DWITH_LUASCRIPTS=ON"
-    "-DWITH_SOUNDS=ON"
+    (lib.cmakeBool "DBUS_NOTIFY" true)
+    (lib.cmakeBool "FREE_SPACE_BAR_C" true)
+    (lib.cmakeBool "LUA_SCRIPT" true)
+    (lib.cmakeBool "PERL_REGEX" true)
+    (lib.cmakeBool "USE_ASPELL" true)
+    (lib.cmakeBool "USE_CLI_JSONRPC" true)
+    (lib.cmakeBool "USE_MINIUPNP" true)
+    (lib.cmakeBool "USE_JS" true)
+    (lib.cmakeBool "WITH_LUASCRIPTS" true)
+    (lib.cmakeBool "WITH_SOUNDS" true)
   ];
 
   postInstall = ''