diff --git a/pkgs/applications/misc/xca/default.nix b/pkgs/applications/misc/xca/default.nix
index 60af439e94b..09da875e236 100644
--- a/pkgs/applications/misc/xca/default.nix
+++ b/pkgs/applications/misc/xca/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "1r2w9gpahjv221j963bd4vn0gj4cxmb9j42f3cd9qdn890hizw84";
   };
 
-  enableParallelBuilding = false;
+  enableParallelBuilding = true;
 
   buildInputs = [ libtool openssl qtbase qttools ];
 
@@ -37,6 +37,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
     license = licenses.bsd3;
     maintainers = with maintainers; [ offline peterhoeg ];
-    broken = builtins.compareVersions qtbase.version "5.7.0" >= 0;
+    broken = builtins.compareVersions qtbase.version "5.7.0" == 0;
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9a8c9b16f4d..e743a15ee31 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16279,7 +16279,7 @@ with pkgs;
   xbmc-retroarch-advanced-launchers = kodi-retroarch-advanced-launchers;
 
   # v1.3.2 segfaults with qt 5.7
-  xca = libsForQt56.callPackage ../applications/misc/xca { };
+  xca = libsForQt5.callPackage ../applications/misc/xca { };
 
   xcalib = callPackage ../tools/X11/xcalib { };