Vulkan: Refactor (pkgconfig -> pkg-config)

Use pkg-config rather than pkgconfig

pkgs/development/tools/vulkan-validation-layers/default.nix

@@ -3,7 +3,7 @@
 , stdenv
 , fetchFromGitHub
 , cmake
-, pkgconfig
+, pkg-config
 , glslang
 , libffi
 , libX11
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
-    pkgconfig
+    pkg-config
   ];
 
   buildInputs = [
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
     "-DSPIRV_HEADERS_INSTALL_DIR=${spirv-headers}"
     "-DROBIN_HOOD_HASHING_INSTALL_DIR=${robin-hood-hashing}"
     "-DBUILD_LAYER_SUPPORT_FILES=ON"
-    "-DPKG_CONFIG_EXECUTABLE=${pkgconfig}/bin/pkg-config"
+    "-DPKG_CONFIG_EXECUTABLE=${pkg-config}/bin/pkg-config"
     # Hide dev warnings that are useless for packaging
     "-Wno-dev"
   ];

pkgs/tools/graphics/vulkan-tools/default.nix

@@ -2,7 +2,7 @@
 , stdenv
 , fetchFromGitHub
 , cmake
-, pkgconfig
+, pkg-config
 , glslang
 , libffi
 , libX11
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
-    pkgconfig
+    pkg-config
   ];
 
   buildInputs = [
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
     "-DBUILD_ICD=OFF"
     # vulkaninfo loads libvulkan using dlopen, so we have to add it manually to RPATH
     "-DCMAKE_INSTALL_RPATH=${libraryPath}"
-    "-DPKG_CONFIG_EXECUTABLE=${pkgconfig}/bin/pkg-config"
+    "-DPKG_CONFIG_EXECUTABLE=${pkg-config}/bin/pkg-config"
     # Hide dev warnings that are useless for packaging
     "-Wno-dev"
   ];