diff --git a/cd.nix b/cd.nix
index a1ffefa..679d1e6 100644
--- a/cd.nix
+++ b/cd.nix
@@ -1,16 +1,20 @@
-{ stdenv
+{ builtins
+, stdenv
 , fetchurl
 , lsb-release
 , pkg-config
 , gtk3
 , im
+, libGL
 , libGLU
 , lua
 , ftgl-tecgraf
 , lib
 }:
 
-stdenv.mkDerivation rec {
+let
+  makePc = import ./make-pc.nix { inherit lib builtins; };
+in stdenv.mkDerivation rec {
   pname = "cd";
   version = "5.14";
 
@@ -26,6 +30,7 @@ stdenv.mkDerivation rec {
   
   buildInputs = [
     gtk3
+    libGL
     libGLU
     lua
     ftgl-tecgraf
@@ -55,19 +60,10 @@ stdenv.mkDerivation rec {
     -Wno-incompatible-pointer-types
   '';
 
-  pc = ''
-prefix=${placeholder "out"}
-exec_prefix=${placeholder "out"}
-libdir=${placeholder "out"}/lib
-includedir=${placeholder "out"}/include
-
-Name: CD
-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
-'';
+  cdPc = builtins.toFile "cd.pc" (makePc "cd" version "gdk-3.0 pango");
+  cdContextPlusPc = builtins.toFile "cdcontextplus.pc" (makePc "cdcontextplus" version "pangocairo cairo");
+  cdGlPc = builtins.toFile "cdgl.pc" (makePc "cdcontextplus" version "gl");
+  cdImPc = builtins.toFile "cdim.pc" (makePc "cdim" version "im");
   
   installPhase = ''
     runHook preInstall
@@ -86,9 +82,10 @@ Requires: im gtk+-3.0 glu
     ln -fs $out/lib/libcdluagl52.so $out/share/lua/5.2/cdluagl.so
     ln -fs $out/lib/libcdluaim52.so $out/share/lua/5.2/cdluaim.so
 
-  cat > $out/lib/pkgconfig/cd.pc <<EOF
-${pc}
-EOF
+    cp -v ${cdPc} $out/lib/pkgconfig/cd.pc
+    cp -v ${cdContextPlusPc} $out/lib/pkgconfig/cdcontextplus.pc
+    cp -v ${cdGlPc} $out/lib/pkgconfig/cdgl.pc
+    cp -v ${cdImPc} $out/lib/pkgconfig/cdim.pc
 
     runHook postInstall
   '';
diff --git a/im.nix b/im.nix
index 6f67f0a..c8f5085 100644
--- a/im.nix
+++ b/im.nix
@@ -1,4 +1,5 @@
-{ lib
+{ builtins
+, lib
 , stdenv
 , fetchurl
 , lsb-release
@@ -9,7 +10,9 @@
 , zlib
 }:
 
-stdenv.mkDerivation rec {
+let
+  makePc = import ./make-pc.nix { inherit lib builtins; };
+in stdenv.mkDerivation rec {
   pname = "im";
   version = "3.15";
 
@@ -30,7 +33,6 @@ stdenv.mkDerivation rec {
     zlib
   ];
 
-  
   postPatch = ''
     sed -i '1i#include <unistd.h>' src/libjasper2/base/jas_stream.c
   '';
@@ -40,19 +42,11 @@ stdenv.mkDerivation rec {
     "USE_LUA_VERSION=52"
   ];
 
-  pc = ''
-prefix=${placeholder "out"}
-exec_prefix=${placeholder "out"}
-libdir=${placeholder "out"}/lib
-includedir=${placeholder "out"}/include
-
-Name: IM
-Description: A toolkit for image representation, storage, capture and processing
-Version: ${version}
-Libs: -L${placeholder "out"} -lim -lim_jp2 -lim_process -lim_process_omp -lim_fftw3
-Cflags: -I${placeholder "out"}/include
-Requires: fftw3 libpng zlib
-'';
+  imPc = builtins.toFile "im.pc" (makePc "im" version "libpng zlib");
+  imJp2Pc = builtins.toFile "im_jp2.pc" (makePc "im_jp2" version "im");
+  imProcessPc = builtins.toFile "im_process.pc" (makePc "im_process" version "im");
+  imProcessOmpPc = builtins.toFile "im_process_omp.pc" (makePc "im_process_omp" version "im");
+  imFftw3Pc = builtins.toFile "im_fftw3.pc" (makePc "im_fftw3" version "im_process fftw3");
   
   installPhase = ''
     runHook preInstall
@@ -72,10 +66,11 @@ Requires: fftw3 libpng zlib
     ln -fs $out/lib/libimlua_process_omp52.so $out/share/lua/5.2/imlua_process_omp.so 
     ln -fs $out/lib/libimlua_fftw352.so $out/share/lua/5.2/imlua_fftw3.so
 
-    # Since IM doesn't supply it, provide pkg-config file.
-  cat > $out/lib/pkgconfig/im.pc <<EOF
-${pc}
-EOF
+    cp ${imPc} $out/lib/pkgconfig/im.pc
+    cp ${imJp2Pc} $out/lib/pkgconfig/im_jp2.pc
+    cp ${imProcessPc} $out/lib/pkgconfig/im_process.pc
+    cp ${imProcessOmpPc} $out/lib/pkgconfig/im_process_omp.pc
+    cp ${imFftw3Pc} $out/lib/pkgconfig/im_fftw3.pc
 
     runHook postInstall
   '';
diff --git a/iup.nix b/iup.nix
index 6ed8abd..2c47b30 100644
--- a/iup.nix
+++ b/iup.nix
@@ -1,4 +1,5 @@
-{ stdenv
+{ builtins
+, stdenv
 , cd
 , fetchurl
 , lsb-release
@@ -7,13 +8,16 @@
 , webkitgtk_4_1
 , libsoup_3
 , im
+, libGL
 , libGLU
 , lua
 , lib
 , ftgl-tecgraf
 }:
 
-stdenv.mkDerivation rec {
+let
+  makePc = import ./make-pc.nix { inherit lib builtins; };
+in stdenv.mkDerivation rec {
   pname = "iup";
   version = "3.32";
 
@@ -31,6 +35,7 @@ stdenv.mkDerivation rec {
     gtk3
     webkitgtk_4_1
     libsoup_3
+    libGL
     libGLU
     lua
     ftgl-tecgraf
@@ -47,8 +52,7 @@ stdenv.mkDerivation rec {
     substituteInPlace srcweb/config.mak \
       --replace-fail "\$(GTK)/include/webkitgtk-4.1" "${webkitgtk_4_1.dev}/include/webkitgtk-4.1" \
       --replace-fail "\$(GTK)/include/libsoup-3.0"   "${libsoup_3.dev}/include/libsoup-3.0"
-  ''
-;
+  '';
   
   makeFlags = [
     "NO_DEPEND=Yes"
@@ -70,20 +74,16 @@ stdenv.mkDerivation rec {
     -Wno-implicit-function-declaration
     -Wno-incompatible-pointer-types
   '';
+  
 
-  pc = ''
-prefix=${placeholder "out"}
-exec_prefix=${placeholder "out"}
-libdir=${placeholder "out"}/lib
-includedir=${placeholder "out"}/include
-
-Name: IUP
-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
-'';
+  iupPc = builtins.toFile "iup.pc" (makePc "iup" version "gtk+-3.0");
+  iupglPc = builtins.toFile "iupgl.pc" (makePc "iupgl" version "gl glu");
+  iupcdPc = builtins.toFile "iupcd.pc" (makePc "iupcd" version "iup cd");
+  iupcontrolsPc = builtins.toFile "iupcontrols.pc" (makePc "iupcontrols" version "iupcd");
+  iupPlotPc = builtins.toFile "iup_plot.pc" (makePc "iup_plot" version "iupcd");
+  iupimPc = builtins.toFile "iupim.pc" (makePc "iupim" version "iup im");
+  iupimglibPc = builtins.toFile "iupimglib.pc" (makePc "iupimglib" version "iup");
+  iupwebPc = builtins.toFile "iupweb.pc" (makePc "iupweb" version "webkit2gtk-4.1");
   
   installPhase = ''
     runHook preInstall
@@ -118,14 +118,19 @@ Requires: cd im gtk+-3.0 glu
     ln -fs $out/lib/libiupluaweb52.so $out/share/lua/5.2/iupluaweb.so
     ln -fs $out/lib/libiupluaimglib52.so $out/share/lua/5.2/iupluaimglib.so
 
+    cp -v ${iupPc} $out/lib/pkgconfig/iup.pc
+    cp -v ${iupglPc} $out/lib/pkgconfig/iupgl.pc
+    cp -v ${iupcdPc} $out/lib/pkgconfig/iupcd.pc
+    cp -v ${iupcontrolsPc} $out/lib/pkgconfig/iupcontrols.pc
+    cp -v ${iupPlotPc} $out/lib/pkgconfig/iup_plot.pc
+    cp -v ${iupimPc} $out/lib/pkgconfig/iupim.pc
+    cp -v ${iupimglibPc} $out/lib/pkgconfig/iupimglib.pc
+    cp -v ${iupwebPc} $out/lib/pkgconfig/iupweb.pc
+
     cp -vr bin/Linux*/* $out/bin/
     chmod +x $out/bin/*
     cp -r etc/* $out/etc
 
-    cat > $out/lib/pkgconfig/iup.pc <<EOF
-${pc}
-EOF
-
     runHook postInstall
   '';
   
diff --git a/make-pc.nix b/make-pc.nix
new file mode 100644
index 0000000..69bed5d
--- /dev/null
+++ b/make-pc.nix
@@ -0,0 +1,20 @@
+{ lib, builtins }:
+
+pkg: version: requires:
+  let
+    pcTemplate = ''
+        prefix=${placeholder "out"}
+        exec_prefix=${placeholder "out"}
+        libdir=${placeholder "out"}/lib
+        includedir=${placeholder "out"}/include
+        
+        Name: @PKG@
+        Version: @VERSION@
+        Libs: -L${placeholder "out"}/lib -l@PKG@
+        Cflags: -I${placeholder "out"}/include
+        Requires: @REQUIRES@
+      '';
+
+    from = [ "@PKG@" "@VERSION@" "@REQUIRES@" ];
+    to = [ pkg version requires ];
+  in builtins.replaceStrings from to pcTemplate