diff --git a/pkgs/applications/graphics/rapcad/default.nix b/pkgs/applications/graphics/rapcad/default.nix
index 701ad47985b..cb92947b766 100644
--- a/pkgs/applications/graphics/rapcad/default.nix
+++ b/pkgs/applications/graphics/rapcad/default.nix
@@ -1,4 +1,6 @@
-{stdenv, fetchgit, qt5, cgal, boost, gmp, mpfr, flex, bison, dxflib, readline }: 
+{ stdenv, fetchgit, cgal, boost, gmp, mpfr, flex, bison, dxflib, readline
+, qtbase
+}:
 
 stdenv.mkDerivation rec {
   version = "0.9.5";
@@ -9,8 +11,8 @@ stdenv.mkDerivation rec {
     rev = "refs/tags/v${version}";
     sha256 = "15c18jvgbwyrfhv7r35ih0gzx35vjlsbi984h1sckgh2z17hjq8l";
   };
-  
-  buildInputs = [qt5.base cgal boost gmp mpfr flex bison dxflib readline ];
+
+  buildInputs = [ qtbase cgal boost gmp mpfr flex bison dxflib readline ];
 
   configurePhase = ''
     qmake;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b8472d7dfaa..948b5b896ad 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12913,7 +12913,7 @@ let
     demo = false;
   };
 
-  rapcad = callPackage ../applications/graphics/rapcad {};
+  rapcad = qt5.callPackage ../applications/graphics/rapcad {};
 
   rapidsvn = callPackage ../applications/version-management/rapidsvn { };