diff --git a/scripts/package-swift.sh b/scripts/package-swift.sh
index bd0ecaab..bc32efe8 100755
--- a/scripts/package-swift.sh
+++ b/scripts/package-swift.sh
@@ -3,6 +3,12 @@ set -euo pipefail
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 PROJECT_ROOT="$( cd "$SCRIPT_DIR/.." && pwd )"
+
+# Ensure cargo is in PATH (rustup proxy may not be available on all CI runners)
+if ! command -v cargo &>/dev/null; then
+  # shellcheck source=/dev/null
+  [ -f "$HOME/.cargo/env" ] && source "$HOME/.cargo/env"
+fi
 SWIFT_DIR="$PROJECT_ROOT/swift"
 GENERATED_DIR="$SWIFT_DIR/Sources/IDKit/Generated"
 IOS_BUILD="$PROJECT_ROOT/ios_build"
diff --git a/swift/Examples/IDKitSampleApp/IDKitSampleApp.xcodeproj/xcshareddata/xcschemes/IDKitSampleApp.xcscheme b/swift/Examples/IDKitSampleApp/IDKitSampleApp.xcodeproj/xcshareddata/xcschemes/IDKitSampleApp.xcscheme
index 8be6f12b..b5fe4d0f 100644
--- a/swift/Examples/IDKitSampleApp/IDKitSampleApp.xcodeproj/xcshareddata/xcschemes/IDKitSampleApp.xcscheme
+++ b/swift/Examples/IDKitSampleApp/IDKitSampleApp.xcodeproj/xcshareddata/xcschemes/IDKitSampleApp.xcscheme
@@ -10,8 +10,8 @@
          <ExecutionAction
             ActionType = "Xcode.IDEStandardExecutionActionsCore.ExecutionActionType.ShellScriptAction">
             <ActionContent
-               title = "Check IDKit Dependencies"
-               scriptText = "REPO_ROOT=&quot;${SRCROOT}/../../..&quot;&#10;XCFRAMEWORK=&quot;${REPO_ROOT}/IDKitFFI.xcframework&quot;&#10;GENERATED=&quot;${REPO_ROOT}/swift/Sources/IDKit/Generated/idkit_core.swift&quot;&#10;&#10;if [ ! -d &quot;${XCFRAMEWORK}&quot; ] || [ ! -f &quot;${GENERATED}&quot; ]; then&#10;  echo &quot;error: IDKit native artifacts not found.&quot; &gt;&amp;2&#10;  echo &quot;error: Run the following from the repo root, then build again:&quot; &gt;&amp;2&#10;  echo &quot;error:   ./scripts/package-swift.sh&quot; &gt;&amp;2&#10;  exit 1&#10;fi&#10;">
+               title = "Build IDKit Dependencies"
+               scriptText = "REPO_ROOT=&quot;${SRCROOT}/../../..&quot;&#10;XCFRAMEWORK=&quot;${REPO_ROOT}/IDKitFFI.xcframework&quot;&#10;GENERATED=&quot;${REPO_ROOT}/swift/Sources/IDKit/Generated/idkit_core.swift&quot;&#10;RUST_SRC=&quot;${REPO_ROOT}/rust/core/src&quot;&#10;&#10;NEEDS_BUILD=0&#10;&#10;if [ ! -d &quot;${XCFRAMEWORK}&quot; ] || [ ! -f &quot;${GENERATED}&quot; ]; then&#10;  NEEDS_BUILD=1&#10;elif [ -n &quot;$(find &quot;${RUST_SRC}&quot; -newer &quot;${GENERATED}&quot; -name &apos;*.rs&apos; -print -quit)&quot; ]; then&#10;  NEEDS_BUILD=1&#10;fi&#10;&#10;if [ &quot;${NEEDS_BUILD}&quot; -eq 1 ]; then&#10;  echo &quot;note: IDKit native artifacts missing or stale — rebuilding...&quot;&#10;  &quot;${REPO_ROOT}/scripts/package-swift.sh&quot;&#10;fi&#10;">
                <EnvironmentBuildable>
                   <BuildableReference
                      BuildableIdentifier = "primary"
diff --git a/swift/Examples/IDKitSampleApp/project.yml b/swift/Examples/IDKitSampleApp/project.yml
index 1c640e17..f67aca0d 100644
--- a/swift/Examples/IDKitSampleApp/project.yml
+++ b/swift/Examples/IDKitSampleApp/project.yml
@@ -35,14 +35,21 @@ schemes:
             REPO_ROOT="${SRCROOT}/../../.."
             XCFRAMEWORK="${REPO_ROOT}/IDKitFFI.xcframework"
             GENERATED="${REPO_ROOT}/swift/Sources/IDKit/Generated/idkit_core.swift"
+            RUST_SRC="${REPO_ROOT}/rust/core/src"
+
+            NEEDS_BUILD=0
 
             if [ ! -d "${XCFRAMEWORK}" ] || [ ! -f "${GENERATED}" ]; then
-              echo "error: IDKit native artifacts not found." >&2
-              echo "error: Run the following from the repo root, then build again:" >&2
-              echo "error:   ./scripts/package-swift.sh" >&2
-              exit 1
+              NEEDS_BUILD=1
+            elif [ -n "$(find "${RUST_SRC}" -newer "${GENERATED}" -name '*.rs' -print -quit)" ]; then
+              NEEDS_BUILD=1
+            fi
+
+            if [ "${NEEDS_BUILD}" -eq 1 ]; then
+              echo "note: IDKit native artifacts missing or stale — rebuilding..."
+              "${REPO_ROOT}/scripts/package-swift.sh"
             fi
-          name: Check IDKit Dependencies
+          name: Build IDKit Dependencies
           settingsTarget: IDKitSampleApp
     run:
       config: Debug