diff --git a/cd.nix b/cd.nix
index f186af2..a1ffefa 100644
--- a/cd.nix
+++ b/cd.nix
@@ -5,8 +5,8 @@
 , gtk3
 , im
 , libGLU
-, ftgl
 , lua
+, ftgl-tecgraf
 , lib
 }:
 
@@ -27,15 +27,14 @@ stdenv.mkDerivation rec {
   buildInputs = [
     gtk3
     libGLU
-    ftgl
     lua
+    ftgl-tecgraf
   ];
 
   propagatedBuildInputs = [
     im
   ];
 
-  # The PDF support relies on a proprietary paid-for library.
   postPatch = ''
     sed -i 's/\bcdpdf\b//g' src/Makefile
     sed -i 's/\bcdluapdf5\b//g' src/Makefile
@@ -47,10 +46,12 @@ stdenv.mkDerivation rec {
     "USE_LUA_VERSION=52"
     "USE_GTK3=Yes"
     "GTK_DEFAULT=Yes"
+
+    "FTGL_LIB=${ftgl-tecgraf}/lib"
+    "FTGL_INC=${ftgl-tecgraf}/include"
   ];
   
   NIX_CFLAGS_COMPILE = ''
-    -Wno-implicit-function-declaration
     -Wno-incompatible-pointer-types
   '';
 
@@ -65,7 +66,7 @@ Description: A vector graphics toolkit with device independent output
 Version: ${version}
 Libs: -L${placeholder "out"}/lib -lcd -lcdcontextplus -lcdgl -lcdim
 Cflags: -I${placeholder "out"}/include
-Requires: im gtk+-3.0 glu ftgl
+Requires: im gtk+-3.0 glu
 '';
   
   installPhase = ''
@@ -94,7 +95,7 @@ EOF
   
   meta = with lib; {
     description = "A vector graphics toolkit with device independent output";
-    license = licenses.mit;
+    license = with licenses; [ mit ];
     maintainers = [ eko5z ];
     platforms = with platforms; gnu ++ linux ++ darwin;
   };
diff --git a/ftgl-tecgraf.nix b/ftgl-tecgraf.nix
new file mode 100644
index 0000000..b3eab66
--- /dev/null
+++ b/ftgl-tecgraf.nix
@@ -0,0 +1,56 @@
+{ fetchurl
+, lib
+, stdenv
+, freetype
+, libGLU
+, pkg-config
+, lsb-release
+, tree
+}:
+
+stdenv.mkDerivation rec {
+  pname = "ftgl-tecgraf";
+  version = "3.32";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/iup/${version}/Docs%20and%20Sources/ftgl-2.1.5_Sources.tar.gz";
+    sha256 = "sha256-v9XqBq5qOm2MxAeybOzCMCqsi7hsQhWtsGkUHVNAekw=";
+  };
+
+  nativeBuildInputs = [
+    lsb-release
+    pkg-config
+  ];
+  
+  buildInputs = [
+    freetype
+    libGLU
+  ];
+
+  makeFlags = [
+    "NO_DEPEND=Yes"
+  ];
+
+  NIX_CFLAGS_COMPILE = ''
+    -fpermissive
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/{lib,include}
+
+    cp -v lib/Linux*/*.so $out/lib/
+    cp -v lib/Linux*/*.a $out/lib/ || true
+    cp -r include/* $out/include
+
+    runHook postInstall
+  '';
+  
+  meta = with lib; {
+    description = "Tecgraf patched FTGL used by CD/IUP";
+    license = with licenses; mit;
+    maintainers = [ eko5z ];
+    platforms = with platforms; gnu ++ linux ++ darwin;
+  };
+}
diff --git a/iup.nix b/iup.nix
index cf47c29..6ed8abd 100644
--- a/iup.nix
+++ b/iup.nix
@@ -8,9 +8,9 @@
 , libsoup_3
 , im
 , libGLU
-, ftgl
 , lua
 , lib
+, ftgl-tecgraf
 }:
 
 stdenv.mkDerivation rec {
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     libsoup_3
     libGLU
     lua
-    ftgl
+    ftgl-tecgraf
   ];
 
   propagatedBuildInputs = [
@@ -62,6 +62,8 @@ stdenv.mkDerivation rec {
     "IM_LIB=${im}/lib"
     "LUA_LIB=${lua}/lib"
     "LUA_INC=${lua}/include"
+    "FTGL_LIB=${ftgl-tecgraf}/lib"
+    "FTGL_INC=${ftgl-tecgraf}/include"
   ];
   
   NIX_CFLAGS_COMPILE = ''
@@ -80,7 +82,7 @@ Description: A portable toolkit for building graphical user interfaces
 Version: ${version}
 Libs: -L${placeholder "out"}/lib -liup -liupgl -liupglcontrols -liupcontrols -liup_plot -liup_mglplot -liupcd -liupim -liupimglib -liup_scintilla -liuptuio -liupweb
 Cflags: -I${placeholder "out"}/include
-Requires: cd im gtk+-3.0 glu ftgl
+Requires: cd im gtk+-3.0 glu
 '';
   
   installPhase = ''
diff --git a/lib/libftgl.a b/lib/libftgl.a
new file mode 100755
index 0000000..d7c9713
Binary files /dev/null and b/lib/libftgl.a differ
diff --git a/lib/libftgl.so b/lib/libftgl.so
new file mode 100755
index 0000000..86ccc27
Binary files /dev/null and b/lib/libftgl.so differ