diff --git a/.github/workflows/ios.yml b/.github/workflows/ios.yml
index 50ec61eec..66852d7dc 100644
--- a/.github/workflows/ios.yml
+++ b/.github/workflows/ios.yml
@@ -60,7 +60,9 @@ jobs:
           # Xcode 26.3 + iOS 18.5 fails to launch arm64 SwiftPM package test
           # runners with CoreSimulator codesigning errors. Build the x86_64
           # simulator slice to match the test command below until that is fixed.
-          NSUnbufferedIO=YES xcodebuild build \
+          # Swift 6.2 macro prebuilts do not support the x86_64 simulator
+          # testable macro target, so build SwiftSyntax from source instead.
+          NSUnbufferedIO=YES xcodebuild -IDEPackageEnablePrebuilts=NO build \
             -scheme OpenSwiftUI \
             -configuration Debug \
             -destination "platform=iOS Simulator,OS=${{ matrix.ios-version }},name=${{ matrix.ios-simulator-name }},arch=x86_64" \
@@ -74,7 +76,7 @@ jobs:
           set -o pipefail
           # See the build step above: force x86_64 to avoid the arm64 package
           # test runner launch/codesigning failure on this Xcode/iOS pair.
-          NSUnbufferedIO=YES xcodebuild test \
+          NSUnbufferedIO=YES xcodebuild -IDEPackageEnablePrebuilts=NO test \
             -scheme OpenSwiftUI \
             -configuration Debug \
             -destination "platform=iOS Simulator,OS=${{ matrix.ios-version }},name=${{ matrix.ios-simulator-name }},arch=x86_64" \
diff --git a/Example/Project.swift b/Example/Project.swift
index 689a7ae0f..75d4c989c 100644
--- a/Example/Project.swift
+++ b/Example/Project.swift
@@ -42,16 +42,12 @@ let openSwiftUIModeSettings: SettingsDictionary = [
 
 let debugModeSettings: SettingsDictionary = [
     "ENABLE_TESTABILITY": "YES",
-    "GCC_PREPROCESSOR_DEFINITIONS": "$(inherited) DEBUG=1",
-    "SWIFT_ACTIVE_COMPILATION_CONDITIONS": "$(inherited) DEBUG",
     "SWIFT_COMPILATION_MODE": "singlefile",
     "SWIFT_OPTIMIZATION_LEVEL": "-Onone",
 ]
 
 let openSwiftUIDebugModeSettings = openSwiftUIModeSettings.merging([
     "ENABLE_TESTABILITY": "YES",
-    "GCC_PREPROCESSOR_DEFINITIONS": "$(inherited) OPENSWIFTUI=1 DEBUG=1",
-    "SWIFT_ACTIVE_COMPILATION_CONDITIONS": "$(inherited) OPENSWIFTUI DEBUG",
     "SWIFT_COMPILATION_MODE": "singlefile",
     "SWIFT_OPTIMIZATION_LEVEL": "-Onone",
 ])
@@ -75,7 +71,7 @@ func settings(base: SettingsDictionary = [:], xcconfig: Path) -> Settings {
     .settings(
         base: base,
         configurations: targetConfigurations(xcconfig),
-        defaultSettings: .none,
+        defaultSettings: .essential,
         defaultConfiguration: "OpenSwiftUIDebug"
     )
 }
@@ -454,7 +450,7 @@ let project = Project(
     ),
     settings: .settings(
         configurations: projectConfigurations,
-        defaultSettings: .none,
+        defaultSettings: .essential,
         defaultConfiguration: "OpenSwiftUIDebug"
     ),
     targets: targets,
diff --git a/Example/Tuist/Package.resolved b/Example/Tuist/Package.resolved
index 300cac598..e252f0305 100644
--- a/Example/Tuist/Package.resolved
+++ b/Example/Tuist/Package.resolved
@@ -4,7 +4,7 @@
     {
       "identity" : "compute",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/OpenSwiftUIProject/Compute",
+      "location" : "https://github.com/openswiftuiproject/compute",
       "state" : {
         "revision" : "bf9cfe57ba8b3dc7307a95fb10a6133e70db3089",
         "version" : "0.3.0-bugfix.1"
@@ -13,7 +13,7 @@
     {
       "identity" : "equatable",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/OpenSwiftUIProject/equatable.git",
+      "location" : "https://github.com/openswiftuiproject/equatable",
       "state" : {
         "branch" : "main",
         "revision" : "8f1dccead65d97173ed695c6c1ba9d0570d35619"
@@ -22,7 +22,7 @@
     {
       "identity" : "opencoregraphics",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/OpenSwiftUIProject/OpenCoreGraphics",
+      "location" : "https://github.com/openswiftuiproject/opencoregraphics",
       "state" : {
         "branch" : "main",
         "revision" : "050239bd42b19a4c8b1ef3936bfb9f3589ecfc46"
@@ -31,7 +31,7 @@
     {
       "identity" : "openobservation",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/OpenSwiftUIProject/OpenObservation",
+      "location" : "https://github.com/openswiftuiproject/openobservation",
       "state" : {
         "branch" : "main",
         "revision" : "05e0581e76b7153338836469320a4789fd0257e2"
@@ -67,7 +67,7 @@
     {
       "identity" : "swift-snapshot-testing",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/OpenSwiftUIProject/swift-snapshot-testing.git",
+      "location" : "https://github.com/openswiftuiproject/swift-snapshot-testing",
       "state" : {
         "revision" : "1bc16f430d8410e7f087d4c787767b26fd32fe30",
         "version" : "1.19.3"
@@ -85,7 +85,7 @@
     {
       "identity" : "symbollocator",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/OpenSwiftUIProject/SymbolLocator.git",
+      "location" : "https://github.com/openswiftuiproject/symbollocator",
       "state" : {
         "revision" : "546053c03f282df1a8270853da6692e1b078be09",
         "version" : "0.2.1"
diff --git a/Example/Tuist/Package.swift b/Example/Tuist/Package.swift
index 120e8f2c6..08b8e4e5e 100644
--- a/Example/Tuist/Package.swift
+++ b/Example/Tuist/Package.swift
@@ -53,8 +53,6 @@ import ProjectDescription
 
 let examplePackageDestinations: Destinations = [.iPhone, .iPad, .mac, .appleVision]
 let openSwiftUIPackageDebugSettings: SettingsDictionary = [
-    "GCC_PREPROCESSOR_DEFINITIONS": "$(inherited) DEBUG=1",
-    "SWIFT_ACTIVE_COMPILATION_CONDITIONS": "$(inherited) DEBUG",
     "SWIFT_COMPILATION_MODE": "singlefile",
     "SWIFT_OPTIMIZATION_LEVEL": "-Onone",
 ]
@@ -115,11 +113,16 @@ let packageSettings = PackageSettings(
     productDestinations: packageProductDestinations,
     baseSettings: .settings(
         configurations: openSwiftUIPackageConfigurations,
-        defaultSettings: .none,
+        defaultSettings: .essential,
         defaultConfiguration: "OpenSwiftUIDebug"
     ),
     targetSettings: [
-        "OpenSwiftUI": .settings(base: openSwiftUITargetSettings),
+        "OpenSwiftUI": .settings(
+            base: openSwiftUITargetSettings,
+            configurations: openSwiftUIPackageConfigurations,
+            defaultSettings: .essential,
+            defaultConfiguration: "OpenSwiftUIDebug"
+        ),
     ]
 )
 #endif
diff --git a/Example/mise.compute.toml b/Example/mise.compute.toml
index 09cabd79a..669d1d17b 100644
--- a/Example/mise.compute.toml
+++ b/Example/mise.compute.toml
@@ -1,7 +1,8 @@
 [tools]
-tuist = "4.193.0"
+tuist = "4.202.5"
 
 [env]
+TUIST_USE_SWIFTERPM=1
 OPENSWIFTUI_OPENATTRIBUTESHIMS_ATTRIBUTEGRAPH = "0"
 OPENSWIFTUI_OPENATTRIBUTESHIMS_COMPUTE = "1"
 OPENSWIFTUI_OPENATTRIBUTESHIMS_COMPUTE_BINARY = "0" # Upstream 0.3.0 still crashs for OSUI. And we need to use our patch
diff --git a/Example/mise.toml b/Example/mise.toml
index 0cc17a74a..781b275bf 100644
--- a/Example/mise.toml
+++ b/Example/mise.toml
@@ -1,5 +1,6 @@
 [tools]
-tuist = "4.193.0"
+tuist = "4.202.5"
 
 [env]
+TUIST_USE_SWIFTERPM=1
 OPENSWIFTUI_OPENATTRIBUTESHIMS_ATTRIBUTEGRAPH = "1"
diff --git a/mise.toml b/mise.toml
index 0cc17a74a..781b275bf 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,5 +1,6 @@
 [tools]
-tuist = "4.193.0"
+tuist = "4.202.5"
 
 [env]
+TUIST_USE_SWIFTERPM=1
 OPENSWIFTUI_OPENATTRIBUTESHIMS_ATTRIBUTEGRAPH = "1"