diff --git a/pkgs/development/libraries/SDL2_mixer/default.nix b/pkgs/development/libraries/SDL2_mixer/default.nix
index 2d1ef9853819..7e562dddf0fd 100644
--- a/pkgs/development/libraries/SDL2_mixer/default.nix
+++ b/pkgs/development/libraries/SDL2_mixer/default.nix
@@ -47,6 +47,8 @@ stdenv.mkDerivation rec {
     timidity
   ];
 
+  outputs = [ "out" "dev" ];
+
   # fix default path to timidity.cfg so MIDI files could be played
   postPatch = ''
     substituteInPlace timidity/options.h \
diff --git a/pkgs/games/eduke32/default.nix b/pkgs/games/eduke32/default.nix
index 4eb46e0ac155..ec65db97ce43 100644
--- a/pkgs/games/eduke32/default.nix
+++ b/pkgs/games/eduke32/default.nix
@@ -58,7 +58,7 @@ in stdenv.mkDerivation rec {
     done
   '';
 
-  NIX_CFLAGS_COMPILE = "-I${SDL2.dev}/include/SDL2 -I${SDL2_mixer}/include/SDL2";
+  NIX_CFLAGS_COMPILE = "-I${lib.getDev SDL2}/include/SDL2 -I${lib.getDev SDL2_mixer}/include/SDL2";
 
   makeFlags = [
     "SDLCONFIG=${SDL2}/bin/sdl2-config"
diff --git a/pkgs/games/ivan/default.nix b/pkgs/games/ivan/default.nix
index 53e1b3cf00e1..80dc182127d1 100644
--- a/pkgs/games/ivan/default.nix
+++ b/pkgs/games/ivan/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = ["-DCMAKE_CXX_FLAGS=-DWIZARD"];
 
   # Help CMake find SDL_mixer.h
-  NIX_CFLAGS_COMPILE = "-I${SDL2_mixer}/include/SDL2";
+  NIX_CFLAGS_COMPILE = "-I${lib.getDev SDL2_mixer}/include/SDL2";
 
   # Create "ivan.desktop" file
   ivanDesktop = makeDesktopItem {
diff --git a/pkgs/games/srb2/default.nix b/pkgs/games/srb2/default.nix
index 57488bdb8b16..26bc4eae96c9 100644
--- a/pkgs/games/srb2/default.nix
+++ b/pkgs/games/srb2/default.nix
@@ -60,8 +60,8 @@ in stdenv.mkDerivation rec {
     "-DSRB2_ASSET_DIRECTORY=/build/source/assets"
     "-DGME_INCLUDE_DIR=${game-music-emu}/include"
     "-DOPENMPT_INCLUDE_DIR=${libopenmpt.dev}/include"
-    "-DSDL2_MIXER_INCLUDE_DIR=${SDL2_mixer}/include/SDL2"
-    "-DSDL2_INCLUDE_DIR=${SDL2.dev}/include/SDL2"
+    "-DSDL2_MIXER_INCLUDE_DIR=${lib.getDev SDL2_mixer}/include/SDL2"
+    "-DSDL2_INCLUDE_DIR=${lib.getDev SDL2}/include/SDL2"
   ];
 
   patches = [
diff --git a/pkgs/games/srb2kart/default.nix b/pkgs/games/srb2kart/default.nix
index e5a29aa56549..cb68125addaa 100644
--- a/pkgs/games/srb2kart/default.nix
+++ b/pkgs/games/srb2kart/default.nix
@@ -52,8 +52,8 @@ in stdenv.mkDerivation rec {
   cmakeFlags = [
     #"-DSRB2_ASSET_DIRECTORY=/build/source/assets"
     "-DGME_INCLUDE_DIR=${game-music-emu}/include"
-    "-DSDL2_MIXER_INCLUDE_DIR=${SDL2_mixer}/include/SDL2"
-    "-DSDL2_INCLUDE_DIR=${SDL2.dev}/include/SDL2"
+    "-DSDL2_MIXER_INCLUDE_DIR=${lib.getDev SDL2_mixer}/include/SDL2"
+    "-DSDL2_INCLUDE_DIR=${lib.getDev SDL2}/include/SDL2"
   ];
 
   patches = [