treewide: move NIX_CFLAGS_COMPILE to the env attrset

doc/languages-frameworks/emscripten.section.md

@@ -60,7 +60,7 @@ See the `zlib` example:
     (old: rec {
       buildInputs = old.buildInputs ++ [ pkg-config ];
       # we need to reset this setting!
-      NIX_CFLAGS_COMPILE="";
+      env = (old.env or { }) // { NIX_CFLAGS_COMPILE = ""; };
       configurePhase = ''
         # FIXME: Some tests require writing at $HOME
         HOME=$TMPDIR

doc/stdenv/stdenv.chapter.md

@@ -1329,7 +1329,7 @@ bin/blib.a(bios_console.o): In function `bios_handle_cup':
 
 Adds the `-O2 -D_FORTIFY_SOURCE=2` compiler options. During code generation the compiler knows a great deal of information about buffer sizes (where possible), and attempts to replace insecure unlimited length buffer function calls with length-limited ones. This is especially useful for old, crufty code. Additionally, format strings in writable memory that contain `%n` are blocked. If an application depends on such a format string, it will need to be worked around.
 
-Additionally, some warnings are enabled which might trigger build failures if compiler warnings are treated as errors in the package build. In this case, set `NIX_CFLAGS_COMPILE` to `-Wno-error=warning-type`.
+Additionally, some warnings are enabled which might trigger build failures if compiler warnings are treated as errors in the package build. In this case, set `env.NIX_CFLAGS_COMPILE` to `-Wno-error=warning-type`.
 
 This needs to be turned off or fixed for errors similar to:
 

pkgs/applications/audio/aacgain/default.nix

@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     libtool
   ];
 
-  NIX_CFLAGS_COMPILE = "-Wno-error=narrowing";
+  env.NIX_CFLAGS_COMPILE = "-Wno-error=narrowing";
 
   meta = with lib; {
     description = "ReplayGain for AAC files";

pkgs/applications/audio/adlplug/default.nix

@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
     "-DADLplug_Jack=${if withJack then "ON" else "OFF"}"
   ];
 
-  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
     # "fp.h" file not found
     "-isystem ${CoreServices}/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers"
   ]);

pkgs/applications/audio/aether-lv2/default.nix

@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     lv2 libX11 libGL libGLU mesa
   ];
 
-  NIX_CFLAGS_COMPILE = [
+  env.NIX_CFLAGS_COMPILE = toString [
     # Needed with GCC 12
     "-Wno-error=array-bounds"
     "-Wno-error=stringop-overflow"

pkgs/applications/audio/audio-recorder/default.nix

@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   };
 
   # https://bugs.launchpad.net/audio-recorder/+bug/1784622
-  NIX_CFLAGS_COMPILE = "-I${glib.dev}/include/gio-unix-2.0";
+  env.NIX_CFLAGS_COMPILE = "-I${glib.dev}/include/gio-unix-2.0";
 
   nativeBuildInputs = [ pkg-config intltool wrapGAppsHook ];
 

pkgs/applications/audio/bespokesynth/default.nix

@@ -108,7 +108,7 @@ stdenv.mkDerivation rec {
     CoreAudioKit
   ];
 
-  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
     # Fails to find fp.h on its own
     "-isystem ${CoreServices}/Library/Frameworks/CoreServices.framework/Versions/Current/Frameworks/CarbonCore.framework/Versions/Current/Headers/"
   ]);

pkgs/applications/audio/bristol/default.nix

@@ -23,7 +23,7 @@ stdenv.mkDerivation  rec {
   # gcc-10. Otherwise build fails as:
   #  ld: brightonCLI.o:/build/bristol-0.60.11/brighton/brightonCLI.c:139: multiple definition of
   #    `event'; brightonMixerMenu.o:/build/bristol-0.60.11/brighton/brightonMixerMenu.c:1182: first defined here
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   preInstall = ''
     sed -e "s@\`which bristol\`@$out/bin/bristol@g" -i bin/startBristol

pkgs/applications/audio/fire/default.nix

@@ -103,7 +103,7 @@ stdenv.mkDerivation rec {
   '';
 
   # Fails to find fp.h on its own
-  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-isystem ${CoreServices}/Library/Frameworks/CoreServices.framework/Versions/Current/Frameworks/CarbonCore.framework/Versions/Current/Headers/";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-isystem ${CoreServices}/Library/Frameworks/CoreServices.framework/Versions/Current/Frameworks/CarbonCore.framework/Versions/Current/Headers/";
 
   doCheck = stdenv.buildPlatform.canExecute stdenv.hostPlatform;
 

pkgs/applications/audio/freewheeling/default.nix

@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
       configureFlags = oldAttrs.configureFlags ++ [ "--enable-openssl-compatibility" ];
     }))
   ];
-  NIX_CFLAGS_COMPILE = toString
+  env.NIX_CFLAGS_COMPILE = toString
     (makeSDLFlags [ SDL SDL_ttf SDL_gfx ] ++ [ "-I${libxml2.dev}/include/libxml2" ]);
 
   hardeningDisable = [ "format" ];

pkgs/applications/audio/furnace/default.nix

@@ -63,11 +63,11 @@ stdenv.mkDerivation rec {
     "-DWARNINGS_ARE_ERRORS=ON"
   ];
 
-  NIX_CFLAGS_COMPILE = lib.optionals (stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "12") [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "12") [
     # Needed with GCC 12 but breaks on darwin (with clang) or aarch64 (old gcc)
     "-Wno-error=mismatched-new-delete"
     "-Wno-error=use-after-free"
-  ];
+  ]);
 
   postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Normal CMake install phase on Darwin only installs the binary, the user is expected to use CPack to build a

pkgs/applications/audio/giada/default.nix

@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     fetchSubmodules = true;
   };
 
-  NIX_CFLAGS_COMPILE = [
+  env.NIX_CFLAGS_COMPILE = toString [
     "-w"
     "-Wno-error"
   ];

pkgs/applications/audio/gnaural/default.nix

@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   # Workaround build failure on -fno-common toolchains:
   #   ld: src/net/../gnauralnet.h:233: multiple definition of `GN_ScheduleFingerprint';
   #     src/net/../../src/gnauralnet.h:233: first defined here
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   postInstall = ''
     mkdir -p $out/share/applications

pkgs/applications/audio/grandorgue/default.nix

@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     "-DINSTALL_DEPEND=OFF"
   ] ++ lib.optional (!includeDemo) "-DINSTALL_DEMO=OFF";
 
-  NIX_CFLAGS_COMPILE = lib.optional stdenv.isDarwin "-DTARGET_OS_IPHONE=0";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-DTARGET_OS_IPHONE=0";
 
   postInstall = lib.optionalString stdenv.isDarwin ''
     mkdir -p $out/{Applications,bin,lib}

pkgs/applications/audio/gtkpod/default.nix

@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   # gcc-10. Otherwise build fails as:
   #   ld: .libs/autodetection.o:/build/gtkpod-2.1.5/libgtkpod/gtkpod_app_iface.h:248: multiple definition of
   #       `gtkpod_app'; .libs/gtkpod_app_iface.o:/build/gtkpod-2.1.5/libgtkpod/gtkpod_app_iface.h:248: first defined here
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   enableParallelBuilding = true;
 

pkgs/applications/audio/guitarix/default.nix

@@ -97,7 +97,7 @@ stdenv.mkDerivation rec {
     "--install-roboto-font"
   ] ++ optional optimizationSupport "--optimization";
 
-  NIX_CFLAGS_COMPILE = [ "-fpermissive" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-fpermissive" ];
 
   meta = with lib; {
     description = "A virtual guitar amplifier for Linux running with JACK";

pkgs/applications/audio/jamin/default.nix

@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   # gcc-10. Otherwise build fails as:
   #     ld: jamin-preferences.o:/build/jamin-0.95.0/src/hdeq.h:64: multiple definition of
   #       `l_notebook1'; jamin-callbacks.o:/build/jamin-0.95.0/src/hdeq.h:64: first defined here
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   postInstall = ''
     wrapProgram $out/bin/jamin --set LADSPA_PATH ${ladspaPlugins}/lib/ladspa

pkgs/applications/audio/klystrack/default.nix

@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   #   ld: libengine_gui.a(gui_menu.o):(.bss+0x0): multiple definition of
   #     `menu_t'; objs.release/action.o:(.bss+0x20): first defined here
   # TODO: remove it for 1.7.7+ release as it was fixed upstream.
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   buildFlags = [ "PREFIX=${placeholder "out"}" "CFG=release" ];
 

pkgs/applications/audio/littlegptracker/default.nix

@@ -35,8 +35,8 @@ stdenv.mkDerivation rec {
     ++ lib.optionals stdenv.isLinux  [ "PLATFORM=DEB" ]
     ++ lib.optionals stdenv.isDarwin [ "PLATFORM=OSX" ];
 
-  NIX_CFLAGS_COMPILE = [ "-fpermissive" ] ++
-    lib.optional stdenv.hostPlatform.isAarch64 "-Wno-error=narrowing";
+  env.NIX_CFLAGS_COMPILE = toString ([ "-fpermissive" ] ++
+    lib.optional stdenv.hostPlatform.isAarch64 "-Wno-error=narrowing");
 
   NIX_LDFLAGS = lib.optional stdenv.isDarwin "-framework Foundation";
 

pkgs/applications/audio/lsp-plugins/default.nix

@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     "PREFIX=${placeholder "out"}"
   ];
 
-  NIX_CFLAGS_COMPILE = "-DLSP_NO_EXPERIMENTAL";
+  env.NIX_CFLAGS_COMPILE = "-DLSP_NO_EXPERIMENTAL";
 
   configurePhase = ''
     make config PREFIX=${placeholder "out"}

pkgs/applications/audio/mi2ly/default.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   hardeningDisable = [ "format" ];
 
-  NIX_CFLAGS_COMPILE = [ "-fgnu89-inline" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-fgnu89-inline" ];
 
   buildPhase = "./cc";
   installPhase = ''

pkgs/applications/audio/mimic/default.nix

@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     pcre2
   ] ++ lib.optional pulseaudioSupport libpulseaudio;
 
-  NIX_CFLAGS_COMPILE = [
+  env.NIX_CFLAGS_COMPILE = toString [
     # Needed with GCC 12
     "-Wno-error=free-nonheap-object"
   ];

pkgs/applications/audio/mp3blaster/default.nix

@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     libvorbis
   ] ++ lib.optional stdenv.isDarwin SDL;
 
-  NIX_CFLAGS_COMPILE = toString ([
+  env.NIX_CFLAGS_COMPILE = toString ([
     "-Wno-narrowing"
   ] ++ lib.optionals stdenv.cc.isClang [
     "-Wno-reserved-user-defined-literal"

pkgs/applications/audio/mpc123/default.nix

@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   # Workaround build failure on -fno-common toolchains like upstream
   # gcc-10. Otherwise build fails as:
   #   ld: /build/cc566Cj9.o:(.bss+0x0): multiple definition of `mpc123_file_reader'; ao.o:(.bss+0x40): first defined here
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   buildInputs = [ gettext libmpcdec libao ];
 

pkgs/applications/audio/mpg321/default.nix

@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   # gcc-10. Otherwise build fails as:
   #   ld: volume.o:/build/mpg321-0.3.2-orig/mpg321.h:119: multiple definition of
   #     `loop_remaining'; mpg321.o:/build/mpg321-0.3.2-orig/mpg321.h:119: first defined here
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   configureFlags =
     [ ("--enable-alsa=" + (if stdenv.isLinux then "yes" else "no")) ]

pkgs/applications/audio/muse/default.nix

@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     libsamplerate libsndfile lilv lrdf lv2 qtsvg rtaudio rubberband sord
   ];
 
-  NIX_CFLAGS_COMPILE = [ "-I${lib.getDev serd}/include/serd-0" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-I${lib.getDev serd}/include/serd-0" ];
 
   meta = with lib; {
     homepage = "https://muse-sequencer.github.io/";

pkgs/applications/audio/oxefmsynth/default.nix

@@ -22,7 +22,7 @@ in stdenv.mkDerivation rec {
     sha256 = "1rk71ls33a38wx8i22plsi7d89cqqxrfxknq5i4f9igsw1ipm4gn";
   };
 
-  NIX_CFLAGS_COMPILE = [ "-Wno-narrowing" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-Wno-narrowing" ];
 
   buildFlags = [ "VSTSDK_PATH=${vst-sdk}/VST2_SDK" ];
 

pkgs/applications/audio/picoloop/default.nix

@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "-f Makefile.PatternPlayer_debian_RtAudio_sdl20" ];
 
-  NIX_CFLAGS_COMPILE = [ "-I${SDL2.dev}/include/SDL2" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-I${SDL2.dev}/include/SDL2" ];
 
   hardeningDisable = [ "format" ];
 

pkgs/applications/audio/pragha/default.nix

@@ -83,7 +83,7 @@ mkDerivation rec {
 
   CFLAGS = [ "-DHAVE_PARANOIA_NEW_INCLUDES" ];
 
-  NIX_CFLAGS_COMPILE = "-I${lib.getDev gst_all_1.gst-plugins-base}/include/gstreamer-1.0";
+  env.NIX_CFLAGS_COMPILE = "-I${lib.getDev gst_all_1.gst-plugins-base}/include/gstreamer-1.0";
 
   postInstall = ''
     qtWrapperArgs+=(--prefix GST_PLUGIN_SYSTEM_PATH_1_0 : "$GST_PLUGIN_SYSTEM_PATH_1_0")

pkgs/applications/audio/sayonara/default.nix

@@ -56,7 +56,7 @@ mkDerivation rec {
   ];
 
   # gstreamer cannot otherwise be found
-  NIX_CFLAGS_COMPILE = "-I${gst_all_1.gst-plugins-base.dev}/include/gstreamer-1.0";
+  env.NIX_CFLAGS_COMPILE = "-I${gst_all_1.gst-plugins-base.dev}/include/gstreamer-1.0";
 
   postInstall = ''
     qtWrapperArgs+=(--prefix GST_PLUGIN_SYSTEM_PATH_1_0 : "$GST_PLUGIN_SYSTEM_PATH_1_0")

pkgs/applications/audio/soundscape-renderer/default.nix

@@ -30,7 +30,7 @@ stdenv.mkDerivation {
   # Without it doesn't find all of the boost libraries.
   BOOST_LIB_DIR = "${boost}/lib";
   # uses the deprecated get_generic_category() in boost_system
-  NIX_CFLAGS_COMPILE = "-DBOOST_SYSTEM_ENABLE_DEPRECATED=1";
+  env.NIX_CFLAGS_COMPILE = "-DBOOST_SYSTEM_ENABLE_DEPRECATED=1";
 
   LC_ALL = "en_US.UTF-8";
 

pkgs/applications/audio/tenacity/default.nix

@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
       --prefix XDG_DATA_DIRS : "$out/share:$GSETTINGS_SCHEMAS_PATH"
   '';
 
-  NIX_CFLAGS_COMPILE = "-D GIT_DESCRIBE=\"\"";
+  env.NIX_CFLAGS_COMPILE = "-D GIT_DESCRIBE=\"\"";
 
   # tenacity only looks for ffmpeg at runtime, so we need to link it in manually
   NIX_LDFLAGS = toString [

pkgs/applications/audio/transcode/default.nix

@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   # gcc-10. Otherwise build fails as:
   #   ld: tcextract-extract_pcm.o:/build/transcode-1.1.7/import/extract_pcm.c:36: multiple definition of
   #     `audio'; tcextract-extract_ac3.o:/build/transcode-1.1.7/import/extract_ac3.c:337: first defined here
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   meta = with lib; {
     description = "Suite of command line utilities for transcoding video and audio codecs, and for converting between different container formats";

pkgs/applications/audio/ympd/default.nix

@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   #   ld: CMakeFiles/ympd.dir/src/mpd_client.c.o:(.bss+0x0): multiple definition of `mpd';
   #     CMakeFiles/ympd.dir/src/ympd.c.o:(.bss+0x20): first defined here
   # Should be fixed by pending https://github.com/notandy/ympd/pull/191 (does not apply as is).
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ libmpdclient openssl ];

pkgs/applications/audio/zynaddsubfx/mruby-zest/default.nix

@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
 
   # Force optimization to fix:
   # warning: #warning _FORTIFY_SOURCE requires compiling with optimization (-O)
-  NIX_CFLAGS_COMPILE = "-O3";
+  env.NIX_CFLAGS_COMPILE = "-O3";
 
   # Remove pre-built y.tab.c to generate with nixpkgs bison
   preBuild = ''

pkgs/applications/blockchains/cgminer/default.nix

@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   #   ld: cgminer-driver-modminer.o:/build/source/miner.h:285:
   #     multiple definition of `bitforce_drv'; cgminer-cgminer.o:/build/source/miner.h:285:
   #     first defined here
-  NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
 
   meta = with lib; {
     description = "CPU/GPU miner in c for bitcoin";

pkgs/applications/display-managers/greetd/gtkgreet.nix

@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
   ];
 
   # G_APPLICATION_FLAGS_NONE is deprecated in GLib 2.73.3+.
-  NIX_CFLAGS_COMPILE = "-Wno-error=deprecated-declarations";
+  env.NIX_CFLAGS_COMPILE = "-Wno-error=deprecated-declarations";
 
   meta = with lib; {
     description = "GTK based greeter for greetd, to be run under cage or similar";

pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix

@@ -266,7 +266,7 @@ let
 
         irony = super.irony.overrideAttrs (old: {
           cmakeFlags = old.cmakeFlags or [ ] ++ [ "-DCMAKE_INSTALL_BINDIR=bin" ];
-          NIX_CFLAGS_COMPILE = "-UCLANG_RESOURCE_DIR";
+          env.NIX_CFLAGS_COMPILE = "-UCLANG_RESOURCE_DIR";
           preConfigure = ''
             cd server
           '';

pkgs/applications/editors/gnome-latex/default.nix

@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
-  NIX_CFLAGS_COMPILE = "-I${glib.dev}/include/gio-unix-2.0";
+  env.NIX_CFLAGS_COMPILE = "-I${glib.dev}/include/gio-unix-2.0";
 
   passthru.updateScript = gnome.updateScript {
     packageName = pname;

pkgs/applications/editors/hexcurse/default.nix

@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "17ckkxfzbqvvfdnh10if4aqdcq98q3vl6dn1v6f4lhr4ifnyjdlk";
   };
   buildInputs = [ ncurses ];
-  NIX_CFLAGS_COMPILE = [ "-Wno-error=stringop-overflow" "-Wno-error=stringop-truncation" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-Wno-error=stringop-overflow" "-Wno-error=stringop-truncation" ];
   patches = [
     # gcc7 compat
     (fetchpatch {

pkgs/applications/editors/ht/default.nix

@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   patches = [ ./gcc7.patch ];
 
-  NIX_CFLAGS_COMPILE = [ "-Wno-narrowing" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-Wno-narrowing" ];
 
   meta = with lib; {
     description = "File editor/viewer/analyzer for executables";

pkgs/applications/editors/nedit/default.nix

@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   # the linux config works fine on darwin too!
   buildFlags = lib.optional (stdenv.isLinux || stdenv.isDarwin) "linux";
 
-  NIX_CFLAGS_COMPILE="-DBUILD_UNTESTED_NEDIT -L${motif}/lib";
+  env.NIX_CFLAGS_COMPILE = "-DBUILD_UNTESTED_NEDIT -L${motif}/lib";
 
   installPhase = ''
     mkdir -p $out/bin

pkgs/applications/editors/texmaker/default.nix

@@ -11,7 +11,7 @@ mkDerivation rec {
 
   buildInputs = [ qtbase qtscript poppler zlib qtwebengine ];
   nativeBuildInputs = [ pkg-config poppler qmake ];
-  NIX_CFLAGS_COMPILE="-I${poppler.dev}/include/poppler";
+  env.NIX_CFLAGS_COMPILE = "-I${poppler.dev}/include/poppler";
 
   qmakeFlags = [
     "DESKTOPDIR=${placeholder "out"}/share/applications"