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-rw-r--r--pkgs/development/libraries/qt-5/default.nix10
1 files changed, 9 insertions, 1 deletions
diff --git a/pkgs/development/libraries/qt-5/default.nix b/pkgs/development/libraries/qt-5/default.nix
index 3a89f20beab..be028e89ce8 100644
--- a/pkgs/development/libraries/qt-5/default.nix
+++ b/pkgs/development/libraries/qt-5/default.nix
@@ -141,7 +141,15 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ python perl pkgconfig ];
 
-  postInstall = if buildDocs then "make docs&&make install_docs" else "";
+  postInstall =
+    ''
+      ${optionalString buildDocs ''
+        make docs && make install_docs
+      ''}
+
+      # Don't retain build-time dependencies like gdb and ruby.
+      sed '/QMAKE_DEFAULT_.*DIRS/ d' -i $out/mkspecs/qconfig.pri
+    '';
 
   #enableParallelBuilding = true; # often fails on Hydra, as well as qt4