diff --git a/pkgs/by-name/mj/mjpegtools/package.nix b/pkgs/by-name/mj/mjpegtools/package.nix
index 7ccbb5310186..157948c85891 100644
--- a/pkgs/by-name/mj/mjpegtools/package.nix
+++ b/pkgs/by-name/mj/mjpegtools/package.nix
@@ -16,7 +16,7 @@
 # TODO:
 # - make dependencies optional
 # - libpng-apng as alternative to libpng?
-# - libXxf86dga support? checking for XF86DGAQueryExtension in -lXxf86dga... no
+# - libxxf86dga support? checking for XF86DGAQueryExtension in -lXxf86dga... no
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "mjpegtools";
diff --git a/pkgs/by-name/ne/nexuiz/package.nix b/pkgs/by-name/ne/nexuiz/package.nix
index a85ec4010ae6..477091589e34 100644
--- a/pkgs/by-name/ne/nexuiz/package.nix
+++ b/pkgs/by-name/ne/nexuiz/package.nix
@@ -19,7 +19,7 @@
   libxpm,
   libxext,
   libXxf86vm,
-  libXxf86dga,
+  libxxf86dga,
   alsa-lib,
   # sdl
   SDL,
@@ -54,7 +54,7 @@ stdenv.mkDerivation {
     libxpm
     libxext
     libXxf86vm
-    libXxf86dga
+    libxxf86dga
     alsa-lib
     # sdl
     SDL
diff --git a/pkgs/by-name/qu/quake3e/package.nix b/pkgs/by-name/qu/quake3e/package.nix
index 562981788ff7..fb1dc45493a6 100644
--- a/pkgs/by-name/qu/quake3e/package.nix
+++ b/pkgs/by-name/qu/quake3e/package.nix
@@ -6,7 +6,7 @@
   curl,
   libGL,
   libx11,
-  libXxf86dga,
+  libxxf86dga,
   alsa-lib,
   libxrandr,
   libXxf86vm,
@@ -38,7 +38,7 @@ stdenv.mkDerivation {
     curl
     libGL
     libx11
-    libXxf86dga
+    libxxf86dga
     alsa-lib
     libxrandr
     libXxf86vm
@@ -53,7 +53,7 @@ stdenv.mkDerivation {
     sed -i -e 's#OpenGLLib = dlopen( dllname#OpenGLLib = dlopen( "${libGL}/lib/libGL.so"#' code/unix/linux_qgl.c
     sed -i -e 's#Sys_LoadLibrary( "libpthread.so.0" )#Sys_LoadLibrary( "${glibc}/lib/libpthread.so.0" )#' code/unix/linux_snd.c
     sed -i -e 's#Sys_LoadLibrary( "libasound.so.2" )#Sys_LoadLibrary( "${alsa-lib}/lib/libasound.so.2" )#' code/unix/linux_snd.c
-    sed -i -e 's#Sys_LoadLibrary( "libXxf86dga.so.1" )#Sys_LoadLibrary( "${libXxf86dga}/lib/libXxf86dga.so.1" )#' code/unix/x11_dga.c
+    sed -i -e 's#Sys_LoadLibrary( "libXxf86dga.so.1" )#Sys_LoadLibrary( "${libxxf86dga}/lib/libXxf86dga.so.1" )#' code/unix/x11_dga.c
     sed -i -e 's#Sys_LoadLibrary( "libXrandr.so.2" )#Sys_LoadLibrary( "${libxrandr}/lib/libXrandr.so.2" )#' code/unix/x11_randr.c
     sed -i -e 's#Sys_LoadLibrary( "libXxf86vm.so.1" )#Sys_LoadLibrary( "${libXxf86vm}/lib/libXxf86vm.so.1" )#' code/unix/x11_randr.c
     sed -i -e 's#Sys_LoadLibrary( "libXxf86vm.so.1" )#Sys_LoadLibrary( "${libXxf86vm}/lib/libXxf86vm.so.1" )#' code/unix/x11_vidmode.c
diff --git a/pkgs/development/libraries/allegro/5.nix b/pkgs/development/libraries/allegro/5.nix
index b82f46aadba6..bb19e3322a40 100644
--- a/pkgs/development/libraries/allegro/5.nix
+++ b/pkgs/development/libraries/allegro/5.nix
@@ -27,7 +27,7 @@
   libxi,
   libxpm,
   libxt,
-  libXxf86dga,
+  libxxf86dga,
   libXxf86misc,
   libXxf86vm,
   openal,
@@ -100,7 +100,7 @@ stdenv.mkDerivation rec {
     libxi
     libxpm
     libxt
-    libXxf86dga
+    libxxf86dga
     libXxf86misc
     libXxf86vm
     xorgproto
diff --git a/pkgs/development/libraries/allegro/default.nix b/pkgs/development/libraries/allegro/default.nix
index 5ab0bfc0d909..f9afff90fa2d 100644
--- a/pkgs/development/libraries/allegro/default.nix
+++ b/pkgs/development/libraries/allegro/default.nix
@@ -15,7 +15,7 @@
   zlib,
   libpng,
   libvorbis,
-  libXxf86dga,
+  libxxf86dga,
   libXxf86misc,
   libXxf86vm,
   openal,
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
     zlib
     libpng
     libvorbis
-    libXxf86dga
+    libxxf86dga
     libXxf86misc
     libXxf86vm
     openal