diff --git a/pkgs/development/mobile/titaniumenv/build-app.nix b/pkgs/development/mobile/titaniumenv/build-app.nix
index 934d032e4791..fb25037e167d 100644
--- a/pkgs/development/mobile/titaniumenv/build-app.nix
+++ b/pkgs/development/mobile/titaniumenv/build-app.nix
@@ -191,7 +191,7 @@ stdenv.mkDerivation {
                bundleId=$(grep '<id>[a-zA-Z0-9.]*</id>' tiapp.xml | sed -e 's|<id>||' -e 's|</id>||' -e 's/ //g')
                version=$(grep '<version>[a-zA-Z0-9.]*</version>' tiapp.xml | sed -e 's|<version>||' -e 's|</version>||' -e 's/ //g')
                
-               sed -e "s|@INSTALL_URL@|${installURL}?bundleId=$bundleId\&amp;version=$version\&amp;title=$appname|" ${../xcodeenv/install.html.template} > $out/$appname.html
+               sed -e "s|@INSTALL_URL@|${installURL}?bundleId=$bundleId\&amp;version=$version\&amp;title=$appname|" ${../xcodeenv/install.html.template} > "$out/$appname.html"
                echo "doc install \"$out/$appname.html\"" >> $out/nix-support/hydra-build-products
              ''}
            ''