diff --git a/pkgs/development/libraries/qt-5/5.11/default.nix b/pkgs/development/libraries/qt-5/5.11/default.nix
index 32245929ce62..05f36f87004c 100644
--- a/pkgs/development/libraries/qt-5/5.11/default.nix
+++ b/pkgs/development/libraries/qt-5/5.11/default.nix
@@ -64,7 +64,10 @@ let
     qttools = [ ./qttools.patch ];
     qtwebengine = [ ./qtwebengine-no-build-skip.patch ]
       ++ optional stdenv.cc.isClang ./qtwebengine-clang-fix.patch
-      ++ optional stdenv.isDarwin ./qtwebengine-darwin-sdk-10.10.patch;
+      ++ optionals stdenv.isDarwin [
+        ./qtwebengine-darwin-no-platform-check.patch
+        ./qtwebengine-darwin-sdk-10.10.patch
+      ];
     qtwebkit = [ ./qtwebkit.patch ]
       ++ optionals stdenv.isDarwin [
         ./qtwebkit-darwin-no-readline.patch
diff --git a/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-no-platform-check.patch b/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-no-platform-check.patch
new file mode 100644
index 000000000000..3e1a8762b361
--- /dev/null
+++ b/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-no-platform-check.patch
@@ -0,0 +1,37 @@
+diff --git a/mkspecs/features/platform.prf b/mkspecs/features/platform.prf
+--- a/mkspecs/features/platform.prf
++++ b/mkspecs/features/platform.prf
+@@ -38,10 +38,6 @@ defineTest(isPlatformSupported) {
+          return(false)
+     }
+   } else:osx {
+-    !isMinXcodeVersion(7, 3) {
+-      skipBuild("Using Xcode version $$QMAKE_XCODE_VERSION, but at least version 7.3 is required to build Qt WebEngine.")
+-      return(false)
+-    }
+     !clang|intel_icc {
+         skipBuild("Qt WebEngine on macOS requires Clang.")
+         return(false)
+@@ -52,10 +48,6 @@ defineTest(isPlatformSupported) {
+       skipBuild("Building Qt WebEngine requires macOS version 10.11 or newer.")
+       return(false)
+     }
+-    !isMinOSXSDKVersion(10, 10): {
+-      skipBuild("Building Qt WebEngine requires a macOS SDK version of 10.11 or newer. Current version is $${WEBENGINE_OSX_SDK_PRODUCT_VERSION}.")
+-      return(false)
+-    }
+   } else {
+     skipBuild("Unknown platform. Qt WebEngine only supports Linux, Windows, and macOS.")
+     return(false)
+diff --git a/src/core/config/mac_osx.pri b/src/core/config/mac_osx.pri
+--- a/src/core/config/mac_osx.pri
++++ b/src/core/config/mac_osx.pri
+@@ -5,8 +5,6 @@ load(functions)
+ # otherwise query for it.
+ QMAKE_MAC_SDK_VERSION = $$eval(QMAKE_MAC_SDK.$${QMAKE_MAC_SDK}.SDKVersion)
+ isEmpty(QMAKE_MAC_SDK_VERSION) {
+-     QMAKE_MAC_SDK_VERSION = $$system("/usr/bin/xcodebuild -sdk $${QMAKE_MAC_SDK} -version SDKVersion 2>/dev/null")
+-     isEmpty(QMAKE_MAC_SDK_VERSION): error("Could not resolve SDK version for \'$${QMAKE_MAC_SDK}\'")
+ }
+ 
+ QMAKE_CLANG_DIR = "/usr"
diff --git a/pkgs/development/libraries/qt-5/5.12/default.nix b/pkgs/development/libraries/qt-5/5.12/default.nix
index bc6432b5ca5a..6d0e241d7a54 100644
--- a/pkgs/development/libraries/qt-5/5.12/default.nix
+++ b/pkgs/development/libraries/qt-5/5.12/default.nix
@@ -63,7 +63,8 @@ let
     qtwebengine = [
       ./qtwebengine-no-build-skip.patch
       ./qtwebengine-CVE-2019-5786.patch
-    ];
+    ]
+      ++ optional stdenv.isDarwin ./qtwebengine-darwin-no-platform-check.patch;
     qtwebkit = [ ./qtwebkit.patch ]
       ++ optionals stdenv.isDarwin [
         ./qtwebkit-darwin-no-readline.patch
diff --git a/pkgs/development/libraries/qt-5/5.12/qtwebengine-darwin-no-platform-check.patch b/pkgs/development/libraries/qt-5/5.12/qtwebengine-darwin-no-platform-check.patch
new file mode 100644
index 000000000000..364330169bf1
--- /dev/null
+++ b/pkgs/development/libraries/qt-5/5.12/qtwebengine-darwin-no-platform-check.patch
@@ -0,0 +1,21 @@
+diff --git a/mkspecs/features/platform.prf b/mkspecs/features/platform.prf
+--- a/mkspecs/features/platform.prf
++++ b/mkspecs/features/platform.prf
+@@ -40,8 +40,6 @@ defineTest(isPlatformSupported) {
+   } else:osx {
+     # FIXME: Try to get it back down to 8.2 for building on OS X 10.11
+     !isMinXcodeVersion(8, 3, 3) {
+-      skipBuild("Using Xcode version $$QMAKE_XCODE_VERSION, but at least version 8.3.3 is required to build Qt WebEngine.")
+-      return(false)
+     }
+     !clang|intel_icc {
+         skipBuild("Qt WebEngine on macOS requires Clang.")
+@@ -54,8 +52,6 @@ defineTest(isPlatformSupported) {
+       return(false)
+     }
+     !isMinOSXSDKVersion(10, 12): {
+-      skipBuild("Building Qt WebEngine requires a macOS SDK version of 10.12 or newer. Current version is $${WEBENGINE_OSX_SDK_PRODUCT_VERSION}.")
+-      return(false)
+     }
+   } else {
+     skipBuild("Unknown platform. Qt WebEngine only supports Linux, Windows, and macOS.")
diff --git a/pkgs/development/libraries/qt-5/5.9/default.nix b/pkgs/development/libraries/qt-5/5.9/default.nix
index 589f175efd9c..5f28a29dd60d 100644
--- a/pkgs/development/libraries/qt-5/5.9/default.nix
+++ b/pkgs/development/libraries/qt-5/5.9/default.nix
@@ -43,7 +43,8 @@ let
     qtscript = [ ./qtscript.patch ];
     qtserialport = [ ./qtserialport.patch ];
     qttools = [ ./qttools.patch ];
-    qtwebengine = [ ./qtwebengine-no-build-skip.patch ];
+    qtwebengine = [ ./qtwebengine-no-build-skip.patch ]
+      ++ optional stdenv.isDarwin ./qtwebengine-darwin-no-platform-check.patch;
     qtwebkit = [ ./qtwebkit.patch ];
     qtvirtualkeyboard = [
       (fetchpatch {
diff --git a/pkgs/development/libraries/qt-5/5.9/qtwebengine-darwin-no-platform-check.patch b/pkgs/development/libraries/qt-5/5.9/qtwebengine-darwin-no-platform-check.patch
new file mode 100644
index 000000000000..7156c41c5ec1
--- /dev/null
+++ b/pkgs/development/libraries/qt-5/5.9/qtwebengine-darwin-no-platform-check.patch
@@ -0,0 +1,50 @@
+diff --git a/mkspecs/features/configure.prf b/mkspecs/features/configure.prf
+--- a/mkspecs/features/configure.prf
++++ b/mkspecs/features/configure.prf
+@@ -194,9 +194,6 @@ defineTest(runConfigure) {
+         } else {
+             log("Native Spellchecker .............. Not enabled         (Default, enable with WEBENGINE_CONFIG+=use_native_spellchecker)$${EOL}")
+         }
+-        !isMinOSXSDKVersion(10, 10, 3) {
+-            log("  Force Touch API usage .............. Not enabled         (Because the OS X SDK version to be used \"$${WEBENGINE_OSX_SDK_PRODUCT_VERSION}\" is lower than the required \"10.10.3\")$${EOL}")
+-        }
+     }
+ }
+ 
+diff --git a/mkspecs/features/functions.prf b/mkspecs/features/functions.prf
+--- a/mkspecs/features/functions.prf
++++ b/mkspecs/features/functions.prf
+@@ -38,10 +38,6 @@ defineTest(isPlatformSupported) {
+       return(false)
+     }
+   } else:osx {
+-    !isMinXcodeVersion(5, 1) {
+-      skipBuild("Using XCode version $$QMAKE_XCODE_VERSION, but at least version 5.1 is required to build Qt WebEngine.")
+-      return(false)
+-    }
+     !clang|intel_icc {
+         skipBuild("Qt WebEngine on macOS requires Clang.")
+         return(false)
+@@ -52,10 +48,6 @@ defineTest(isPlatformSupported) {
+       skipBuild("Qt WebEngine requires OS X version 10.10 or newer.")
+       return(false)
+     }
+-    !isMinOSXSDKVersion(10, 10): {
+-      skipBuild("Qt WebEngine requires an OS X SDK version of 10.10 or newer. Current version is $${WEBENGINE_OSX_SDK_PRODUCT_VERSION}.")
+-      return(false)
+-    }
+   } else {
+     skipBuild("Unknown platform. Qt WebEngine only supports Linux, Windows, and OS X.")
+     return(false)
+diff --git a/src/core/config/mac_osx.pri b/src/core/config/mac_osx.pri
+--- a/src/core/config/mac_osx.pri
++++ b/src/core/config/mac_osx.pri
+@@ -5,8 +5,6 @@ load(functions)
+ # otherwise query for it.
+ QMAKE_MAC_SDK_VERSION = $$eval(QMAKE_MAC_SDK.$${QMAKE_MAC_SDK}.SDKVersion)
+ isEmpty(QMAKE_MAC_SDK_VERSION) {
+-     QMAKE_MAC_SDK_VERSION = $$system("/usr/bin/xcodebuild -sdk $${QMAKE_MAC_SDK} -version SDKVersion 2>/dev/null")
+-     isEmpty(QMAKE_MAC_SDK_VERSION): error("Could not resolve SDK version for \'$${QMAKE_MAC_SDK}\'")
+ }
+ 
+ QMAKE_CLANG_DIR = "/usr"
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebengine.nix b/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
index ddb828323371..35d7b2c09f66 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
@@ -67,18 +67,8 @@ qtModule {
         src/3rdparty/chromium/gpu/config/gpu_info_collector_linux.cc
     ''
     + optionalString stdenv.isDarwin (''
-      # Remove annoying xcode check
-      substituteInPlace mkspecs/features/platform.prf \
-        --replace "lessThan(QMAKE_XCODE_VERSION, 7.3)" false \
-        --replace "/usr/bin/xcodebuild" "xcodebuild"
-
-      substituteInPlace src/3rdparty/chromium/build/mac_toolchain.py \
-        --replace "/usr/bin/xcode-select" "xcode-select"
-
       substituteInPlace src/core/config/mac_osx.pri \
-        --replace /usr ${stdenv.cc} \
-        --replace "isEmpty(QMAKE_MAC_SDK_VERSION)" false
-
+        --replace /usr ${stdenv.cc}
     ''
     # TODO remove when new Apple SDK is in
     + (if lib.versionOlder qtCompatVersion "5.11" then ''