diff --git a/pkgs/applications/audio/quodlibet/default.nix b/pkgs/applications/audio/quodlibet/default.nix
index 2a170b3ccfd..52e8b4f8183 100644
--- a/pkgs/applications/audio/quodlibet/default.nix
+++ b/pkgs/applications/audio/quodlibet/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, python3, wrapGAppsHook, gettext, libsoup, gnome, gtk3, gdk-pixbuf, librsvg,
-  tag ? "", xvfb_run, dbus, glibcLocales, glib, glib-networking, gobject-introspection, hicolor-icon-theme,
+  tag ? "", xvfb-run, dbus, glibcLocales, glib, glib-networking, gobject-introspection, hicolor-icon-theme,
   gst_all_1, withGstPlugins ? true,
   xineBackend ? false, xine-lib,
   withDbusPython ? false, withPyInotify ? false, withMusicBrainzNgs ? false, withPahoMqtt ? false,
@@ -20,7 +20,7 @@ python3.pkgs.buildPythonApplication rec {
 
   nativeBuildInputs = [ wrapGAppsHook gettext ];
 
-  checkInputs = [ gdk-pixbuf hicolor-icon-theme ] ++ (with python3.pkgs; [ pytest pytest_xdist polib xvfb_run dbus.daemon glibcLocales ]);
+  checkInputs = [ gdk-pixbuf hicolor-icon-theme ] ++ (with python3.pkgs; [ pytest pytest_xdist polib xvfb-run dbus.daemon glibcLocales ]);
 
   buildInputs = [ gnome.adwaita-icon-theme libsoup glib glib-networking gtk3 webkitgtk gdk-pixbuf keybinder3 gtksourceview libmodplug libappindicator-gtk3 kakasi gobject-introspection ]
     ++ (if xineBackend then [ xine-lib ] else with gst_all_1;
diff --git a/pkgs/applications/audio/sublime-music/default.nix b/pkgs/applications/audio/sublime-music/default.nix
index cd43b5d53a2..3d25ec3cdbb 100644
--- a/pkgs/applications/audio/sublime-music/default.nix
+++ b/pkgs/applications/audio/sublime-music/default.nix
@@ -5,7 +5,7 @@
 , gtk3
 , pango
 , wrapGAppsHook
-, xvfb_run
+, xvfb-run
 , chromecastSupport ? false
 , serverSupport ? false
 , keyringSupport ? true
@@ -66,7 +66,7 @@ python3Packages.buildPythonApplication rec {
     pytest
     pytest-cov
   ];
-  checkPhase = "${xvfb_run}/bin/xvfb-run pytest";
+  checkPhase = "${xvfb-run}/bin/xvfb-run pytest";
 
   # Also run the python import check for sanity
   pythonImportsCheck = [ "sublime_music" ];
diff --git a/pkgs/applications/editors/gnome-builder/default.nix b/pkgs/applications/editors/gnome-builder/default.nix
index 0279dfc5b37..998341d6bb5 100644
--- a/pkgs/applications/editors/gnome-builder/default.nix
+++ b/pkgs/applications/editors/gnome-builder/default.nix
@@ -34,7 +34,7 @@
 , webkitgtk
 , wrapGAppsHook
 , dbus
-, xvfb_run
+, xvfb-run
 }:
 
 stdenv.mkDerivation rec {
@@ -89,7 +89,7 @@ stdenv.mkDerivation rec {
 
   checkInputs = [
     dbus
-    xvfb_run
+    xvfb-run
   ];
 
   outputs = [ "out" "devdoc" ];
diff --git a/pkgs/applications/graphics/gscan2pdf/default.nix b/pkgs/applications/graphics/gscan2pdf/default.nix
index 616a0b71356..67f624ce9c9 100644
--- a/pkgs/applications/graphics/gscan2pdf/default.nix
+++ b/pkgs/applications/graphics/gscan2pdf/default.nix
@@ -4,7 +4,7 @@
   # runtime dependencies
   imagemagick, libtiff, djvulibre, poppler_utils, ghostscript, unpaper, pdftk,
   # test dependencies
-  xvfb_run, liberation_ttf, file, tesseract }:
+  xvfb-run, liberation_ttf, file, tesseract }:
 
 with lib;
 
@@ -94,7 +94,7 @@ perlPackages.buildPerlPackage rec {
     unpaper
     pdftk
 
-    xvfb_run
+    xvfb-run
     file
     tesseract # tests are expecting tesseract 3.x precisely
   ] ++ (with perlPackages; [
diff --git a/pkgs/applications/graphics/vimiv/default.nix b/pkgs/applications/graphics/vimiv/default.nix
index 6f6245a1c80..a6320f774fd 100644
--- a/pkgs/applications/graphics/vimiv/default.nix
+++ b/pkgs/applications/graphics/vimiv/default.nix
@@ -2,7 +2,7 @@
 , gnome
 
 # Test requirements
-, dbus, xvfb_run, xdotool
+, dbus, xvfb-run, xdotool
 }:
 
 python3Packages.buildPythonApplication rec {
@@ -37,7 +37,7 @@ python3Packages.buildPythonApplication rec {
       vimiv/imageactions.py
   '';
 
-  checkInputs = [ python3Packages.nose dbus.daemon xvfb_run xdotool ];
+  checkInputs = [ python3Packages.nose dbus.daemon xvfb-run xdotool ];
   buildInputs = [ gnome.adwaita-icon-theme librsvg ];
   propagatedBuildInputs = with python3Packages; [ pillow pygobject3 gtk3 ];
 
diff --git a/pkgs/applications/misc/girara/default.nix b/pkgs/applications/misc/girara/default.nix
index f8ebd8aed7e..cc13ad59332 100644
--- a/pkgs/applications/misc/girara/default.nix
+++ b/pkgs/applications/misc/girara/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, meson, ninja, pkg-config, check, dbus, xvfb_run, glib, gtk, gettext, libiconv, json_c, libintl
+{ lib, stdenv, fetchurl, meson, ninja, pkg-config, check, dbus, xvfb-run, glib, gtk, gettext, libiconv, json_c, libintl
 }:
 
 stdenv.mkDerivation rec {
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "1n3i960b458172mc3pkq7m9dn5qxry6fms3c3k06v27cjp5whsyf";
   };
 
-  nativeBuildInputs = [ meson ninja pkg-config gettext check dbus xvfb_run ];
+  nativeBuildInputs = [ meson ninja pkg-config gettext check dbus xvfb-run ];
   buildInputs = [ libintl libiconv json_c ];
   propagatedBuildInputs = [ glib gtk ];
 
diff --git a/pkgs/applications/misc/pytrainer/default.nix b/pkgs/applications/misc/pytrainer/default.nix
index 00be8103683..05cc834591f 100644
--- a/pkgs/applications/misc/pytrainer/default.nix
+++ b/pkgs/applications/misc/pytrainer/default.nix
@@ -13,7 +13,7 @@
 , tzdata
 , webkitgtk
 , wrapGAppsHook
-, xvfb_run
+, xvfb-run
 }:
 
 let
@@ -66,7 +66,7 @@ in python.pkgs.buildPythonApplication rec {
   checkInputs = [
     glibcLocales
     perl
-    xvfb_run
+    xvfb-run
   ] ++ (with python.pkgs; [
     mysqlclient
     psycopg2
diff --git a/pkgs/applications/misc/ulauncher/default.nix b/pkgs/applications/misc/ulauncher/default.nix
index d95ce9cda48..ebfaaa1db51 100644
--- a/pkgs/applications/misc/ulauncher/default.nix
+++ b/pkgs/applications/misc/ulauncher/default.nix
@@ -14,7 +14,7 @@
 , libappindicator
 , intltool
 , wmctrl
-, xvfb_run
+, xvfb-run
 , librsvg
 }:
 
@@ -66,7 +66,7 @@ python3Packages.buildPythonApplication rec {
     mock
     pytest
     pytest-mock
-    xvfb_run
+    xvfb-run
   ];
 
   patches = [
diff --git a/pkgs/applications/networking/calls/default.nix b/pkgs/applications/networking/calls/default.nix
index d17dd059c81..52e1bc50601 100644
--- a/pkgs/applications/networking/calls/default.nix
+++ b/pkgs/applications/networking/calls/default.nix
@@ -21,7 +21,7 @@
 , dbus
 , vala
 , wrapGAppsHook
-, xvfb_run
+, xvfb-run
 , gtk-doc
 , docbook-xsl-nons
 , docbook_xml_dtd_43
@@ -71,7 +71,7 @@ stdenv.mkDerivation rec {
 
   checkInputs = [
     dbus
-    xvfb_run
+    xvfb-run
   ];
 
   NIX_CFLAGS_COMPILE = "-I${glib.dev}/include/gio-unix-2.0";
diff --git a/pkgs/applications/networking/flent/default.nix b/pkgs/applications/networking/flent/default.nix
index bcff9e4f8b7..9e76a73233c 100644
--- a/pkgs/applications/networking/flent/default.nix
+++ b/pkgs/applications/networking/flent/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonApplication, fetchPypi, matplotlib, procps, pyqt5, python
-, pythonPackages, qt5, sphinx, xvfb_run }:
+, pythonPackages, qt5, sphinx, xvfb-run }:
 
 buildPythonApplication rec {
   pname = "flent";
@@ -12,7 +12,7 @@ buildPythonApplication rec {
   buildInputs = [ sphinx ];
   nativeBuildInputs = [ qt5.wrapQtAppsHook ];
   propagatedBuildInputs = [ matplotlib procps pyqt5 ];
-  checkInputs = [ procps pythonPackages.mock pyqt5 xvfb_run ];
+  checkInputs = [ procps pythonPackages.mock pyqt5 xvfb-run ];
 
   checkPhase = ''
     cat >test-runner <<EOF
diff --git a/pkgs/applications/networking/instant-messengers/gajim/default.nix b/pkgs/applications/networking/instant-messengers/gajim/default.nix
index ee9c902543c..74a4ab968c9 100644
--- a/pkgs/applications/networking/instant-messengers/gajim/default.nix
+++ b/pkgs/applications/networking/instant-messengers/gajim/default.nix
@@ -5,7 +5,7 @@
 , glib-networking
 
 # Test dependencies
-, xvfb_run, dbus
+, xvfb-run, dbus
 
 # Optional dependencies
 , enableJingle ? true, farstream, gstreamer, gst-plugins-base, gst-libav, gst-plugins-good, libnice
@@ -52,7 +52,7 @@ python3.pkgs.buildPythonApplication rec {
     ++ lib.optionals enableOmemoPluginDependencies [ python-axolotl qrcode ]
     ++ extraPythonPackages python3.pkgs;
 
-  checkInputs = [ xvfb_run dbus.daemon ];
+  checkInputs = [ xvfb-run dbus.daemon ];
 
   checkPhase = ''
     # https://dev.gajim.org/gajim/gajim/-/issues/10478
diff --git a/pkgs/applications/office/gtg/default.nix b/pkgs/applications/office/gtg/default.nix
index 3b7052dff7f..4b9237d23ce 100644
--- a/pkgs/applications/office/gtg/default.nix
+++ b/pkgs/applications/office/gtg/default.nix
@@ -11,7 +11,7 @@
 , pango
 , gdk-pixbuf
 , gobject-introspection
-, xvfb_run
+, xvfb-run
 }:
 
 python3Packages.buildPythonApplication rec {
@@ -53,7 +53,7 @@ python3Packages.buildPythonApplication rec {
   checkInputs = with python3Packages; [
     nose
     mock
-    xvfb_run
+    xvfb-run
   ];
 
   preBuild = ''
diff --git a/pkgs/applications/office/kmymoney/default.nix b/pkgs/applications/office/kmymoney/default.nix
index 1d8a214c818..95da79cca4f 100644
--- a/pkgs/applications/office/kmymoney/default.nix
+++ b/pkgs/applications/office/kmymoney/default.nix
@@ -8,7 +8,7 @@
 , sqlcipher
 
 # Needed for running tests:
-, qtbase, xvfb_run
+, qtbase, xvfb-run
 
 , python2, python3Packages
 }:
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
   '';
 
   doInstallCheck = stdenv.hostPlatform == stdenv.buildPlatform;
-  installCheckInputs = [ xvfb_run ];
+  installCheckInputs = [ xvfb-run ];
   installCheckPhase =
     lib.optionalString doInstallCheck ''
       xvfb-run -s '-screen 0 1024x768x24' make test \
diff --git a/pkgs/applications/office/paperwork/paperwork-gtk.nix b/pkgs/applications/office/paperwork/paperwork-gtk.nix
index d37db7cddb2..3bf9f1af9a5 100644
--- a/pkgs/applications/office/paperwork/paperwork-gtk.nix
+++ b/pkgs/applications/office/paperwork/paperwork-gtk.nix
@@ -4,7 +4,7 @@
 , cairo
 , gnome
 , librsvg
-, xvfb_run
+, xvfb-run
 , dbus
 , libnotify
 , wrapGAppsHook
@@ -53,7 +53,7 @@ python3Packages.buildPythonApplication rec {
     done
   '';
 
-  checkInputs = [ xvfb_run dbus.daemon ];
+  checkInputs = [ xvfb-run dbus.daemon ];
 
   nativeBuildInputs = [
     wrapGAppsHook
diff --git a/pkgs/applications/window-managers/i3/default.nix b/pkgs/applications/window-managers/i3/default.nix
index 305c1d728f3..70c6b9942db 100644
--- a/pkgs/applications/window-managers/i3/default.nix
+++ b/pkgs/applications/window-managers/i3/default.nix
@@ -1,7 +1,7 @@
 { fetchurl, lib, stdenv, pkg-config, makeWrapper, meson, ninja, installShellFiles, libxcb, xcbutilkeysyms
 , xcbutil, xcbutilwm, xcbutilxrm, libstartup_notification, libX11, pcre, libev
 , yajl, xcb-util-cursor, perl, pango, perlPackages, libxkbcommon
-, xorgserver, xvfb_run }:
+, xorgserver, xvfb-run }:
 
 stdenv.mkDerivation rec {
   pname = "i3";
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     libstartup_notification libX11 pcre libev yajl xcb-util-cursor perl pango
     perlPackages.AnyEventI3 perlPackages.X11XCB perlPackages.IPCRun
     perlPackages.ExtUtilsPkgConfig perlPackages.InlineC
-    xorgserver xvfb_run
+    xorgserver xvfb-run
   ];
 
   configureFlags = [ "--disable-builddir" ];
diff --git a/pkgs/applications/window-managers/phosh/default.nix b/pkgs/applications/window-managers/phosh/default.nix
index 8be84abbdfb..64677c8505f 100644
--- a/pkgs/applications/window-managers/phosh/default.nix
+++ b/pkgs/applications/window-managers/phosh/default.nix
@@ -18,7 +18,7 @@
 , upower
 , wayland
 , dbus
-, xvfb_run
+, xvfb-run
 , phoc
 , feedbackd
 , networkmanager
@@ -98,7 +98,7 @@ in stdenv.mkDerivation rec {
 
   checkInputs = [
     dbus
-    xvfb_run
+    xvfb-run
   ];
 
   # Temporarily disabled - Test is broken (SIGABRT)
diff --git a/pkgs/desktops/cinnamon/cjs/default.nix b/pkgs/desktops/cinnamon/cjs/default.nix
index 1a1e8132bd6..2e1c739c0f0 100644
--- a/pkgs/desktops/cinnamon/cjs/default.nix
+++ b/pkgs/desktops/cinnamon/cjs/default.nix
@@ -20,7 +20,7 @@
 , meson
 , sysprof
 , dbus
-, xvfb_run
+, xvfb-run
 , ninja
 , makeWrapper
 , which
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
   ];
 
   checkInputs = [
-    xvfb_run
+    xvfb-run
   ];
 
   propagatedBuildInputs = [
diff --git a/pkgs/desktops/gnome/core/totem/default.nix b/pkgs/desktops/gnome/core/totem/default.nix
index f7541fe12ed..45b99680a12 100644
--- a/pkgs/desktops/gnome/core/totem/default.nix
+++ b/pkgs/desktops/gnome/core/totem/default.nix
@@ -25,7 +25,7 @@
 , gnome-desktop
 , gsettings-desktop-schemas
 , gdk-pixbuf
-, xvfb_run
+, xvfb-run
 }:
 
 stdenv.mkDerivation rec {
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
   ];
 
   checkInputs = [
-    xvfb_run
+    xvfb-run
   ];
 
   mesonFlags = [
diff --git a/pkgs/desktops/gnome/misc/geary/default.nix b/pkgs/desktops/gnome/misc/geary/default.nix
index a40cd30eb8d..37eca7ccc72 100644
--- a/pkgs/desktops/gnome/misc/geary/default.nix
+++ b/pkgs/desktops/gnome/misc/geary/default.nix
@@ -29,7 +29,7 @@
 , python3
 , gnutls
 , cacert
-, xvfb_run
+, xvfb-run
 , glibcLocales
 , dbus
 , shared-mime-info
@@ -99,7 +99,7 @@ stdenv.mkDerivation rec {
     dbus
     gnutls # for certtool
     cacert # trust store for glib-networking
-    xvfb_run
+    xvfb-run
     glibcLocales # required by Geary.ImapDb.DatabaseTest/utf8_case_insensitive_collation
   ];
 
diff --git a/pkgs/development/libraries/amtk/default.nix b/pkgs/development/libraries/amtk/default.nix
index efea7ef624e..5743a18c0fd 100644
--- a/pkgs/development/libraries/amtk/default.nix
+++ b/pkgs/development/libraries/amtk/default.nix
@@ -7,7 +7,7 @@
 , gobject-introspection
 , gnome
 , dbus
-, xvfb_run
+, xvfb-run
 }:
 
 stdenv.mkDerivation rec {
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   doCheck = stdenv.isLinux;
   checkPhase = ''
     export NO_AT_BRIDGE=1
-    ${xvfb_run}/bin/xvfb-run -s '-screen 0 800x600x24' dbus-run-session \
+    ${xvfb-run}/bin/xvfb-run -s '-screen 0 800x600x24' dbus-run-session \
       --config-file=${dbus.daemon}/share/dbus-1/session.conf \
       meson test --print-errorlogs
   '';
diff --git a/pkgs/development/libraries/gjs/default.nix b/pkgs/development/libraries/gjs/default.nix
index d6920086034..342d498f154 100644
--- a/pkgs/development/libraries/gjs/default.nix
+++ b/pkgs/development/libraries/gjs/default.nix
@@ -19,7 +19,7 @@
 , harfbuzz
 , makeWrapper
 , which
-, xvfb_run
+, xvfb-run
 , nixosTests
 }:
 
@@ -65,7 +65,7 @@ in stdenv.mkDerivation rec {
   ];
 
   checkInputs = [
-    xvfb_run
+    xvfb-run
   ] ++ testDeps;
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/libraries/gtkmm/4.x.nix b/pkgs/development/libraries/gtkmm/4.x.nix
index 04fa7e5dd2f..50839568462 100644
--- a/pkgs/development/libraries/gtkmm/4.x.nix
+++ b/pkgs/development/libraries/gtkmm/4.x.nix
@@ -12,7 +12,7 @@
 , epoxy
 , gnome
 , makeFontsConf
-, xvfb_run
+, xvfb-run
 }:
 
 stdenv.mkDerivation rec {
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   ];
 
   checkInputs = [
-    xvfb_run
+    xvfb-run
   ];
 
   # Tests require fontconfig.
diff --git a/pkgs/development/libraries/gtksourceview/3.x.nix b/pkgs/development/libraries/gtksourceview/3.x.nix
index 84a20154b13..dce589dd647 100644
--- a/pkgs/development/libraries/gtksourceview/3.x.nix
+++ b/pkgs/development/libraries/gtksourceview/3.x.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, pkg-config, atk, cairo, glib, gtk3, pango, vala
-, libxml2, perl, intltool, gettext, gobject-introspection, dbus, xvfb_run, shared-mime-info }:
+, libxml2, perl, intltool, gettext, gobject-introspection, dbus, xvfb-run, shared-mime-info }:
 
 stdenv.mkDerivation rec {
   pname = "gtksourceview";
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config intltool perl gobject-introspection vala ];
 
-  checkInputs = [ xvfb_run dbus ];
+  checkInputs = [ xvfb-run dbus ];
 
   buildInputs = [ atk cairo glib pango libxml2 gettext ];
 
diff --git a/pkgs/development/libraries/gtksourceview/4.x.nix b/pkgs/development/libraries/gtksourceview/4.x.nix
index 21dc5c3a884..eb92586ce84 100644
--- a/pkgs/development/libraries/gtksourceview/4.x.nix
+++ b/pkgs/development/libraries/gtksourceview/4.x.nix
@@ -18,7 +18,7 @@
 , gnome
 , gobject-introspection
 , dbus
-, xvfb_run
+, xvfb-run
 , shared-mime-info
 }:
 
@@ -74,7 +74,7 @@ stdenv.mkDerivation rec {
   ];
 
   checkInputs = [
-    xvfb_run
+    xvfb-run
     dbus
   ];
 
diff --git a/pkgs/development/libraries/gtksourceview/5.x.nix b/pkgs/development/libraries/gtksourceview/5.x.nix
index 6825b34d0ac..fd4a420012c 100644
--- a/pkgs/development/libraries/gtksourceview/5.x.nix
+++ b/pkgs/development/libraries/gtksourceview/5.x.nix
@@ -16,7 +16,7 @@
 , gnome
 , gobject-introspection
 , dbus
-, xvfb_run
+, xvfb-run
 , shared-mime-info
 }:
 
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
   ];
 
   checkInputs = [
-    xvfb_run
+    xvfb-run
     dbus
   ];
 
diff --git a/pkgs/development/libraries/libadwaita/default.nix b/pkgs/development/libraries/libadwaita/default.nix
index 486326f15f8..f3b9cad0720 100644
--- a/pkgs/development/libraries/libadwaita/default.nix
+++ b/pkgs/development/libraries/libadwaita/default.nix
@@ -10,7 +10,7 @@
 , vala
 , gobject-introspection
 , gtk4
-, xvfb_run
+, xvfb-run
 }:
 
 stdenv.mkDerivation rec {
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
   ];
 
   checkInputs = [
-    xvfb_run
+    xvfb-run
   ];
 
   doCheck = true;
diff --git a/pkgs/development/libraries/libdazzle/default.nix b/pkgs/development/libraries/libdazzle/default.nix
index 912e79d5410..d62614c56c7 100644
--- a/pkgs/development/libraries/libdazzle/default.nix
+++ b/pkgs/development/libraries/libdazzle/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, ninja, meson, pkg-config, vala, gobject-introspection, libxml2
-, gtk-doc, docbook_xsl, docbook_xml_dtd_43, dbus, xvfb_run, glib, gtk3, gnome }:
+, gtk-doc, docbook_xsl, docbook_xml_dtd_43, dbus, xvfb-run, glib, gtk3, gnome }:
 
 stdenv.mkDerivation rec {
   pname = "libdazzle";
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     sha256 = "19abrrjsyjhhl1xflnb0likb9wwzz78fa1mk2b064rpscmz9mafv";
   };
 
-  nativeBuildInputs = [ ninja meson pkg-config vala gobject-introspection libxml2 gtk-doc docbook_xsl docbook_xml_dtd_43 dbus xvfb_run glib ];
+  nativeBuildInputs = [ ninja meson pkg-config vala gobject-introspection libxml2 gtk-doc docbook_xsl docbook_xml_dtd_43 dbus xvfb-run glib ];
   buildInputs = [ glib gtk3 ];
 
   mesonFlags = [
diff --git a/pkgs/development/libraries/libhandy/0.x.nix b/pkgs/development/libraries/libhandy/0.x.nix
index d836efb1aeb..7597aee697a 100644
--- a/pkgs/development/libraries/libhandy/0.x.nix
+++ b/pkgs/development/libraries/libhandy/0.x.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitLab, meson, ninja, pkg-config, gobject-introspection, vala
 , gtk-doc, docbook_xsl, docbook_xml_dtd_43
 , gtk3, gnome
-, dbus, xvfb_run, libxml2
+, dbus, xvfb-run, libxml2
 , hicolor-icon-theme
 }:
 
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     gtk-doc docbook_xsl docbook_xml_dtd_43
   ];
   buildInputs = [ gnome.gnome-desktop gtk3 libxml2 ];
-  checkInputs = [ dbus xvfb_run hicolor-icon-theme ];
+  checkInputs = [ dbus xvfb-run hicolor-icon-theme ];
 
   mesonFlags = [
     "-Dgtk_doc=true"
diff --git a/pkgs/development/libraries/libhandy/default.nix b/pkgs/development/libraries/libhandy/default.nix
index 65f8ccd39ec..891bd04ea54 100644
--- a/pkgs/development/libraries/libhandy/default.nix
+++ b/pkgs/development/libraries/libhandy/default.nix
@@ -13,7 +13,7 @@
 , enableGlade ? false
 , glade
 , dbus
-, xvfb_run
+, xvfb-run
 , libxml2
 , gdk-pixbuf
 , librsvg
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
 
   checkInputs = [
     dbus
-    xvfb_run
+    xvfb-run
     at-spi2-atk
     at-spi2-core
     librsvg
diff --git a/pkgs/development/libraries/libsecret/default.nix b/pkgs/development/libraries/libsecret/default.nix
index 8d9011bc575..18f00a0933c 100644
--- a/pkgs/development/libraries/libsecret/default.nix
+++ b/pkgs/development/libraries/libsecret/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchurl, fetchpatch, glib, pkg-config, gettext, libxslt, python3
 , docbook_xsl, docbook_xml_dtd_42 , libgcrypt, gobject-introspection, vala
-, gtk-doc, gnome, gjs, libintl, dbus, xvfb_run }:
+, gtk-doc, gnome, gjs, libintl, dbus, xvfb-run }:
 
 stdenv.mkDerivation rec {
   pname = "libsecret";
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   installCheckInputs = [
-    python3 python3.pkgs.dbus-python python3.pkgs.pygobject3 xvfb_run dbus gjs
+    python3 python3.pkgs.dbus-python python3.pkgs.pygobject3 xvfb-run dbus gjs
   ];
 
   # needs to run after install because typelibs point to absolute paths
diff --git a/pkgs/development/python-modules/dogtail/default.nix b/pkgs/development/python-modules/dogtail/default.nix
index 4981440c7cc..808c2916ddd 100644
--- a/pkgs/development/python-modules/dogtail/default.nix
+++ b/pkgs/development/python-modules/dogtail/default.nix
@@ -10,7 +10,7 @@
 , gsettings-desktop-schemas
 , fetchurl
 , dbus
-, xvfb_run
+, xvfb-run
 , wrapGAppsHook
 # , fetchPypi
 }:
@@ -33,7 +33,7 @@ buildPythonPackage {
     ./nix-support.patch
   ];
 
-  nativeBuildInputs = [ gobject-introspection dbus xvfb_run wrapGAppsHook ]; # for setup hooks
+  nativeBuildInputs = [ gobject-introspection dbus xvfb-run wrapGAppsHook ]; # for setup hooks
   propagatedBuildInputs = [ at-spi2-core gtk3 pygobject3 pyatspi pycairo ];
   strictDeps = false; # issue 56943
 
diff --git a/pkgs/development/python-modules/liblarch/default.nix b/pkgs/development/python-modules/liblarch/default.nix
index 5ff8d25d54b..957d37f2176 100644
--- a/pkgs/development/python-modules/liblarch/default.nix
+++ b/pkgs/development/python-modules/liblarch/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 , python
 , pygobject3
-, xvfb_run
+, xvfb-run
 , gobject-introspection
 , gtk3
 , pythonOlder
@@ -32,7 +32,7 @@ buildPythonPackage rec {
 
   checkPhase = ''
     runHook preCheck
-    ${xvfb_run}/bin/xvfb-run -s '-screen 0 800x600x24' \
+    ${xvfb-run}/bin/xvfb-run -s '-screen 0 800x600x24' \
       ${python.interpreter} nix_run_setup test
     runHook postCheck
   '';
diff --git a/pkgs/development/python-modules/pystray/default.nix b/pkgs/development/python-modules/pystray/default.nix
index 9b778f9e216..45bc2a55e59 100644
--- a/pkgs/development/python-modules/pystray/default.nix
+++ b/pkgs/development/python-modules/pystray/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, fetchFromGitHub
-, pillow, xlib, six, xvfb_run, sphinx }:
+, pillow, xlib, six, xvfb-run, sphinx }:
 
 buildPythonPackage rec {
   pname = "pystray";
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ sphinx ];
   propagatedBuildInputs = [ pillow xlib six ];
-  checkInputs = [ xvfb_run ];
+  checkInputs = [ xvfb-run ];
 
   checkPhase = ''
     rm tests/icon_tests.py # test needs user input
diff --git a/pkgs/development/python-modules/pywebview/default.nix b/pkgs/development/python-modules/pywebview/default.nix
index a020517dcce..e750f234faf 100644
--- a/pkgs/development/python-modules/pywebview/default.nix
+++ b/pkgs/development/python-modules/pywebview/default.nix
@@ -6,7 +6,7 @@
 , pytest
 , pythonOlder
 , qt5
-, xvfb_run
+, xvfb-run
 }:
 
 buildPythonPackage rec {
@@ -31,7 +31,7 @@ buildPythonPackage rec {
 
   checkInputs = [
     pytest
-    xvfb_run
+    xvfb-run
   ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/xdot/default.nix b/pkgs/development/python-modules/xdot/default.nix
index 7dbbd89e781..e28deaf07d6 100644
--- a/pkgs/development/python-modules/xdot/default.nix
+++ b/pkgs/development/python-modules/xdot/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k, python3, xvfb_run
+{ lib, buildPythonPackage, fetchPypi, isPy3k, python3, xvfb-run
 , wrapGAppsHook, gobject-introspection, pygobject3, graphviz, gtk3, numpy }:
 
 buildPythonPackage rec {
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   disabled = !isPy3k;
   nativeBuildInputs = [ wrapGAppsHook ];
   propagatedBuildInputs = [ gobject-introspection pygobject3 graphviz gtk3 numpy ];
-  checkInputs = [ xvfb_run ];
+  checkInputs = [ xvfb-run ];
 
   checkPhase = ''
     xvfb-run -s '-screen 0 800x600x24' ${python3.interpreter} nix_run_setup test
diff --git a/pkgs/development/r-modules/generic-builder.nix b/pkgs/development/r-modules/generic-builder.nix
index 1e96a64a5e2..a10c3628ff8 100644
--- a/pkgs/development/r-modules/generic-builder.nix
+++ b/pkgs/development/r-modules/generic-builder.nix
@@ -1,10 +1,10 @@
-{ stdenv, lib, R, libcxx, xvfb_run, util-linux, Cocoa, Foundation, gettext, gfortran }:
+{ stdenv, lib, R, libcxx, xvfb-run, util-linux, Cocoa, Foundation, gettext, gfortran }:
 
 { name, buildInputs ? [], requireX ? false, ... } @ attrs:
 
 stdenv.mkDerivation ({
   buildInputs = buildInputs ++ [R gettext] ++
-                lib.optionals requireX [util-linux xvfb_run] ++
+                lib.optionals requireX [util-linux xvfb-run] ++
                 lib.optionals stdenv.isDarwin [Cocoa Foundation gfortran];
 
   NIX_CFLAGS_COMPILE =
@@ -29,7 +29,7 @@ stdenv.mkDerivation ({
   rCommand = if requireX then
     # Unfortunately, xvfb-run has a race condition even with -a option, so that
     # we acquire a lock explicitly.
-    "flock ${xvfb_run} xvfb-run -a -e xvfb-error R"
+    "flock ${xvfb-run} xvfb-run -a -e xvfb-error R"
   else
     "R";
 
diff --git a/pkgs/tools/misc/xvfb-run/default.nix b/pkgs/tools/misc/xvfb-run/default.nix
index 05750b962f0..aad76062e36 100644
--- a/pkgs/tools/misc/xvfb-run/default.nix
+++ b/pkgs/tools/misc/xvfb-run/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, makeWrapper, xorgserver, getopt
 , xauth, util-linux, which, fontsConf, gawk, coreutils }:
 let
-  xvfb_run = fetchurl {
+  xvfb-run = fetchurl {
     name = "xvfb-run";
     # https://git.archlinux.org/svntogit/packages.git/?h=packages/xorg-server
     url = "https://git.archlinux.org/svntogit/packages.git/plain/trunk/xvfb-run?h=packages/xorg-server&id=9cb733cefa92af3fca608fb051d5251160c9bbff";
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ makeWrapper ];
   buildCommand = ''
     mkdir -p $out/bin
-    cp ${xvfb_run} $out/bin/xvfb-run
+    cp ${xvfb-run} $out/bin/xvfb-run
 
     chmod a+x $out/bin/xvfb-run
     patchShebangs $out/bin/xvfb-run
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 45bcc928352..10a6de27deb 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -9248,7 +9248,7 @@ let
     propagatedBuildInputs = [ Readonly Gtk3 ];
     checkInputs = [ TestDifferences PerlMagick TryTiny TestMockObject CarpAlways pkgs.librsvg ];
     checkPhase = ''
-      ${pkgs.xvfb_run}/bin/xvfb-run -s '-screen 0 800x600x24' \
+      ${pkgs.xvfb-run}/bin/xvfb-run -s '-screen 0 800x600x24' \
         make test
     '';
     meta = {