diff --git a/Source/ThirdParty/libwebrtc/ChangeLog b/Source/ThirdParty/libwebrtc/ChangeLog
index 627bce1..2e5a7f7 100644
--- a/Source/ThirdParty/libwebrtc/ChangeLog
+++ b/Source/ThirdParty/libwebrtc/ChangeLog
@@ -1,3 +1,15 @@
+2022-01-25  Michael Saboff  <msaboff@apple.com>
+
+        Install build failure when using SYSTEM_CONTENT_PATH
+        https://bugs.webkit.org/show_bug.cgi?id=235609
+
+        Reviewed by Filip Pizlo.
+
+        Change the Create Symlinks to Alternate Root script to create the links for the headers
+        for both the install headers and install phases.
+
+        * Scripts/create-symlink-to-altroot.sh:
+
 2022-01-24  Youenn Fablet  <youenn@apple.com>
 
         Cherry-pick WebRTC 235826 change
diff --git a/Source/ThirdParty/libwebrtc/Scripts/create-symlink-to-altroot.sh b/Source/ThirdParty/libwebrtc/Scripts/create-symlink-to-altroot.sh
index 5b7a891..d10239a 100755
--- a/Source/ThirdParty/libwebrtc/Scripts/create-symlink-to-altroot.sh
+++ b/Source/ThirdParty/libwebrtc/Scripts/create-symlink-to-altroot.sh
@@ -2,18 +2,14 @@
 
 set -e
 
-if [[ "${ACTION}" == "installhdrs" && ( -z "${SYSTEM_PUBLIC_HEADER_PREFIX}" || -z "${HEADER_FOLDER_LIST}" ) ]]; then
-    exit 0
-fi
-
-if [[ "${ACTION}" == "install" && ( -z "${SYSTEM_PUBLIC_LIBRARY_PREFIX}" || -z "${LIBRARY_LIST}" ) ]]; then
-    exit 0
-fi
-
 if [[ "${SKIP_INSTALL}" == "YES" ]]; then
     exit 0
 fi
 
+if [[ -z "${SYSTEM_PUBLIC_HEADER_PREFIX}" || -z "${HEADER_FOLDER_LIST}" || -z "${SYSTEM_PUBLIC_LIBRARY_PREFIX}" || -z "${LIBRARY_LIST}" ]]; then
+    exit 0
+fi
+
 create_symlink_if_needed()
 {
     INSTALL_FOLDER_PREFIX=$1
@@ -43,7 +39,7 @@
     ln -sf "${SYMLINK_VALUE}" "${SYSTEM_HEADER_PATH}"
 }
 
-if [[ "${ACTION}" == "installhdrs" ]]
+if [[ "${ACTION}" == "installhdrs" || "${ACTION}" == "install" ]]
 then
     if [[ ! -d ${SYSTEM_PUBLIC_HEADER_PREFIX} ]]; then
         mkdir -p ${SYSTEM_PUBLIC_HEADER_PREFIX}
diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
index 39e645a..9dd8567 100644
--- a/Source/WebKit/ChangeLog
+++ b/Source/WebKit/ChangeLog
@@ -1,3 +1,20 @@
+2022-01-25  Michael Saboff  <msaboff@apple.com>
+
+        Install build failure when using SYSTEM_CONTENT_PATH
+        https://bugs.webkit.org/show_bug.cgi?id=235609
+
+        Reviewed by Filip Pizlo.
+
+        Eliminated the Output Files of the Create Symlink to Alt Root Path script for the targets
+        adattributiond, GPU, Networking, WebAuthn, webpushd, and the various WebContent targets,
+        since the symlink to WebKit.framework will be created by the "WebKit" target.
+        Also fixed the INSTALL_PATH for adattributiond and webpushd to follow the difference between
+        macOS and iOS.
+
+        * Configurations/adattributiond.xcconfig:
+        * Configurations/webpushd.xcconfig:
+        * WebKit.xcodeproj/project.pbxproj:
+
 2022-01-25  Per Arne Vollan  <pvollan@apple.com>
  
          [macOS][WP] Allow mach extension to service
diff --git a/Source/WebKit/Configurations/adattributiond.xcconfig b/Source/WebKit/Configurations/adattributiond.xcconfig
index 2f8fe5c..4f83553 100644
--- a/Source/WebKit/Configurations/adattributiond.xcconfig
+++ b/Source/WebKit/Configurations/adattributiond.xcconfig
@@ -37,7 +37,7 @@
 INSTALL_PATH[sdk=iphone*] = $(WEBKIT_FRAMEWORKS_DIR)/WebKit.framework/Daemons;
 INSTALL_PATH[sdk=macosx*] = $(WEBKIT_FRAMEWORKS_DIR)/WebKit.framework/Versions/A/Daemons;
 
-ALTERNATE_ROOT_PATH = $(WEBKIT_FRAMEWORKS_DIR)/WebKit.framework/Daemons;
+ALTERNATE_ROOT_PATH = $(INSTALL_PATH);
 
 OUTPUT_ALTERNATE_ROOT_PATH = $(OUTPUT_ALTERNATE_ROOT_PATH_$(USE_SYSTEM_CONTENT_PATH));
 OUTPUT_ALTERNATE_ROOT_PATH_YES = $(DSTROOT)$(ALTERNATE_ROOT_PATH)/$(FULL_PRODUCT_NAME);
diff --git a/Source/WebKit/Configurations/webpushd.xcconfig b/Source/WebKit/Configurations/webpushd.xcconfig
index dea6f52..d1b7933 100644
--- a/Source/WebKit/Configurations/webpushd.xcconfig
+++ b/Source/WebKit/Configurations/webpushd.xcconfig
@@ -44,7 +44,7 @@
 INSTALL_PATH[sdk=iphone*] = $(WEBKIT_FRAMEWORKS_DIR)/WebKit.framework/Daemons;
 INSTALL_PATH[sdk=macosx*] = $(WEBKIT_FRAMEWORKS_DIR)/WebKit.framework/Versions/A/Daemons;
 
-ALTERNATE_ROOT_PATH = $(WEBKIT_FRAMEWORKS_DIR)/WebKit.framework/Daemons;
+ALTERNATE_ROOT_PATH = $(INSTALL_PATH);
 
 OUTPUT_ALTERNATE_ROOT_PATH = $(OUTPUT_ALTERNATE_ROOT_PATH_$(USE_SYSTEM_CONTENT_PATH));
 OUTPUT_ALTERNATE_ROOT_PATH_YES = $(DSTROOT)$(ALTERNATE_ROOT_PATH)/$(FULL_PRODUCT_NAME);
diff --git a/Source/WebKit/WebKit.xcodeproj/project.pbxproj b/Source/WebKit/WebKit.xcodeproj/project.pbxproj
index a115c88..716c6a6 100644
--- a/Source/WebKit/WebKit.xcodeproj/project.pbxproj
+++ b/Source/WebKit/WebKit.xcodeproj/project.pbxproj
@@ -14954,7 +14954,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -14973,7 +14972,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -14992,7 +14990,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -15011,7 +15008,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -15030,7 +15026,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -15049,7 +15044,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -15068,7 +15062,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -15087,7 +15080,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -15106,7 +15098,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;
@@ -15125,7 +15116,6 @@
 			outputFileListPaths = (
 			);
 			outputPaths = (
-				"${OUTPUT_ALTERNATE_ROOT_PATH}",
 			);
 			runOnlyForDeploymentPostprocessing = 1;
 			shellPath = /bin/zsh;