diff --git a/pkgs/development/libraries/openscenegraph/3.4.0.nix b/pkgs/development/libraries/openscenegraph/3.4.0.nix
new file mode 100644
index 000000000000..8d0839041890
--- /dev/null
+++ b/pkgs/development/libraries/openscenegraph/3.4.0.nix
@@ -0,0 +1,39 @@
+{ stdenv, lib, fetchurl, cmake, pkgconfig, doxygen, unzip
+, freetype, libjpeg, jasper, libxml2, zlib, gdal, curl, libX11
+, cairo, poppler, librsvg, libpng, libtiff, libXrandr
+, xineLib, boost
+, withApps ? false
+, withSDL ? false, SDL
+, withQt4 ? false, qt4
+}:
+
+stdenv.mkDerivation rec {
+  name = "openscenegraph-${version}";
+  version = "3.4.0";
+
+  src = fetchurl {
+    url = "http://trac.openscenegraph.org/downloads/developer_releases/OpenSceneGraph-${version}.zip";
+    sha256 = "03h4wfqqk7rf3mpz0sa99gy715cwpala7964z2npd8jxfn27swjw";
+  };
+
+  nativeBuildInputs = [ pkgconfig cmake doxygen unzip ];
+
+  buildInputs = [
+    freetype libjpeg jasper libxml2 zlib gdal curl libX11
+    cairo poppler librsvg libpng libtiff libXrandr boost
+    xineLib
+  ] ++ lib.optional withSDL SDL
+    ++ lib.optional withQt4 qt4;
+
+  enableParallelBuilding = true;
+
+  cmakeFlags = lib.optional (!withApps) "-DBUILD_OSG_APPLICATIONS=OFF";
+
+  meta = with stdenv.lib; {
+    description = "A 3D graphics toolkit";
+    homepage = http://www.openscenegraph.org/;
+    maintainers = [ maintainers.raskin ];
+    platforms = platforms.linux;
+    license = "OpenSceneGraph Public License - free LGPL-based license";
+  };
+}
diff --git a/pkgs/development/libraries/simgear/default.nix b/pkgs/development/libraries/simgear/default.nix
index 28b96d17aa60..196fb59bb171 100644
--- a/pkgs/development/libraries/simgear/default.nix
+++ b/pkgs/development/libraries/simgear/default.nix
@@ -6,12 +6,12 @@
 
 stdenv.mkDerivation rec {
   name = "simgear-${version}";
-  version = "2017.3.1";
-  shortVersion = "2017.3";
+  version = "2018.2.2";
+  shortVersion = "2018.2";
 
   src = fetchurl {
     url = "mirror://sourceforge/flightgear/release-${shortVersion}/${name}.tar.bz2";
-    sha256 = "1x71wvycs2bjgmmacswgk6091p65p46fr40mr7f4kcipnx88bq0f";
+    sha256 = "f61576bc36aae36f350154749df1cee396763604c06b8a71c4b50452d9151ce5";
   };
 
   buildInputs = [ plib freeglut xproto libX11 libXext xextproto libXi inputproto
@@ -28,4 +28,3 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl2;
   };
 }
-
diff --git a/pkgs/games/flightgear/default.nix b/pkgs/games/flightgear/default.nix
index b7a4af54929d..f3b77d87e179 100644
--- a/pkgs/games/flightgear/default.nix
+++ b/pkgs/games/flightgear/default.nix
@@ -6,14 +6,14 @@
 }:
 
 let
-  version = "2017.3.1";
-  shortVersion = "2017.3";
+  version = "2018.2.2";
+  shortVersion = "2018.2";
   data = stdenv.mkDerivation rec {
     name = "flightgear-base-${version}";
 
     src = fetchurl {
       url = "mirror://sourceforge/flightgear/release-${shortVersion}/FlightGear-${version}-data.tar.bz2";
-      sha256 = "166q0fsbp17lx1l1n6i8cfk3d1i79pasz1liya09z6m2i1pb026z";
+      sha256 = "c89b94e4cf3cb7eda728daf6cca6dd051f7a47863776c99fd2f3fe0054400ac4";
     };
 
     phases = [ "installPhase" ];
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "mirror://sourceforge/flightgear/release-${shortVersion}/${name}.tar.bz2";
-    sha256 = "1kccf91vmxnzyki6grx09s10dvr4j6qrz34ikj7jn81g5scisbkg";
+    sha256 = "61f809ef0a3f6908d156f0c483ed5313d31b5a6ac74761955d0b266751718147";
   };
 
   # Of all the files in the source and data archives, there doesn't seem to be
diff --git a/pkgs/games/speed-dreams/default.nix b/pkgs/games/speed-dreams/default.nix
index 4bf03fec9de9..5f6e20c39b6b 100644
--- a/pkgs/games/speed-dreams/default.nix
+++ b/pkgs/games/speed-dreams/default.nix
@@ -35,6 +35,12 @@ stdenv.mkDerivation rec {
     tar -xf ${wip-cars-and-tracks}
   '';
 
+  prePatch = ''
+    # https://sourceforge.net/p/speed-dreams/mailman/message/35665539/
+    sed -i "s|lastSlash = '\\\0'|lastSlash = NULL|" src/libs/tgf/params.cpp
+    sed -i "s|const char\* error = '\\\0'|const char\* error = NULL|" src/libs/tgfclient/openalmusicplayer.cpp
+  '';
+
   preBuild = ''
     make -C src/libs/portability
     make -C src/libs/portability portability.o
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 20dbd2552dcb..4e06c6aece52 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11605,6 +11605,7 @@ with pkgs;
   opensaml-cpp = callPackage ../development/libraries/opensaml-cpp { };
 
   openscenegraph = callPackage ../development/libraries/openscenegraph { };
+  openscenegraph_3_4 = callPackage ../development/libraries/openscenegraph/3.4.0.nix { };
 
   openslp = callPackage ../development/libraries/openslp {};
 
@@ -12190,7 +12191,7 @@ with pkgs;
     avrlibc = pkgsCross.avr.libcCross;
   };
 
-  simgear = callPackage ../development/libraries/simgear { };
+  simgear = callPackage ../development/libraries/simgear { openscenegraph = openscenegraph_3_4; };
 
   simp_le = callPackage ../tools/admin/simp_le { };
 
@@ -20238,7 +20239,7 @@ with pkgs;
 
   fish-fillets-ng = callPackage ../games/fish-fillets-ng {};
 
-  flightgear = libsForQt5.callPackage ../games/flightgear { };
+  flightgear = libsForQt5.callPackage ../games/flightgear { openscenegraph = openscenegraph_3_4; };
 
   flock = callPackage ../development/tools/flock { };
 
@@ -20680,6 +20681,7 @@ with pkgs;
     # Torcs wants to make shared libraries linked with plib libraries (it provides static).
     # i686 is the only platform I know than can do that linking without plib built with -fPIC
     libpng = libpng12;
+    openscenegraph = openscenegraph_3_4;
   };
 
   torcs = callPackage ../games/torcs { };