diff --git a/pkgs/desktops/gnome-3/3.20/apps/evolution/default.nix b/pkgs/desktops/gnome-3/3.20/apps/evolution/default.nix
index a9bb87d4ddd..6ae149cd570 100644
--- a/pkgs/desktops/gnome-3/3.20/apps/evolution/default.nix
+++ b/pkgs/desktops/gnome-3/3.20/apps/evolution/default.nix
@@ -27,7 +27,7 @@ in stdenv.mkDerivation rec {
   configureFlags = [ "--disable-spamassassin" "--disable-pst-import" "--disable-autoar"
                      "--disable-libcryptui" ];
 
-  NIX_CFLAGS_COMPILE = "-I${nspr}/include/nspr -I${nss}/include/nss -I${glib}/include/gio-unix-2.0";
+  NIX_CFLAGS_COMPILE = "-I${nspr.dev}/include/nspr -I${nss}/include/nss -I${glib.dev}/include/gio-unix-2.0";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/desktops/gnome-3/3.20/core/epiphany/default.nix b/pkgs/desktops/gnome-3/3.20/core/epiphany/default.nix
index 322dd3bedac..5043d7cf2fe 100644
--- a/pkgs/desktops/gnome-3/3.20/core/epiphany/default.nix
+++ b/pkgs/desktops/gnome-3/3.20/core/epiphany/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
                   gdk_pixbuf gnome3.defaultIconTheme librsvg which gnome_common
                   gcr avahi gnome3.gsettings_desktop_schemas gnome3.dconf ];
 
-  NIX_CFLAGS_COMPILE = "-I${nspr}/include/nspr -I${nss}/include/nss -I${glib}/include/gio-unix-2.0";
+  NIX_CFLAGS_COMPILE = "-I${nspr.dev}/include/nspr -I${nss}/include/nss -I${glib.dev}/include/gio-unix-2.0";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/desktops/gnome-3/3.20/core/folks/default.nix b/pkgs/desktops/gnome-3/3.20/core/folks/default.nix
index 899ee8e4d75..842864b0b81 100644
--- a/pkgs/desktops/gnome-3/3.20/core/folks/default.nix
+++ b/pkgs/desktops/gnome-3/3.20/core/folks/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = "--disable-fatal-warnings";
 
-  NIX_CFLAGS_COMPILE = ["-I${nspr}/include/nspr" "-I${nss}/include/nss"
+  NIX_CFLAGS_COMPILE = ["-I${nspr.dev}/include/nspr" "-I${nss}/include/nss"
                         "-I${dbus_glib.dev}/include/dbus-1.0" "-I${dbus_libs.dev}/include/dbus-1.0"];
 
   enableParallelBuilding = true;