diff --git a/pkgs/development/compilers/swift/wrapper/default.nix b/pkgs/development/compilers/swift/wrapper/default.nix
index 0c7e0f8cbcf8..2bf8ef60ebf3 100644
--- a/pkgs/development/compilers/swift/wrapper/default.nix
+++ b/pkgs/development/compilers/swift/wrapper/default.nix
@@ -18,6 +18,10 @@ stdenv.mkDerivation (swift._wrapperParams // {
     swiftStaticModuleSubdir swiftStaticLibSubdir;
   swiftDriver = lib.optionalString useSwiftDriver "${swift-driver}/bin/swift-driver";
 
+  env.darwinMinVersion = lib.optionalString stdenv.targetPlatform.isDarwin (
+    stdenv.targetPlatform.darwinMinVersion
+  );
+
   passAsFile = [ "buildCommand" ];
   buildCommand = ''
     mkdir -p $out/bin $out/nix-support
@@ -48,6 +52,13 @@ stdenv.mkDerivation (swift._wrapperParams // {
     ln -s ${swift.lib}/lib $out/lib
 
     substituteAll ${./setup-hook.sh} $out/nix-support/setup-hook
+
+    # Propagate any propagated inputs from the unwrapped Swift compiler, if any.
+    if [ -e "$swift/nix-support" ]; then
+      for input in "$swift/nix-support/"*propagated*; do
+        cp "$input" "$out/nix-support/$(basename "$input")"
+      done
+    fi
   '';
 
   passthru = {
diff --git a/pkgs/development/compilers/swift/wrapper/wrapper.sh b/pkgs/development/compilers/swift/wrapper/wrapper.sh
index 5cd5d8da8819..3079bb182b1a 100644
--- a/pkgs/development/compilers/swift/wrapper/wrapper.sh
+++ b/pkgs/development/compilers/swift/wrapper/wrapper.sh
@@ -156,6 +156,14 @@ if [ -z "${NIX_CC_WRAPPER_FLAGS_SET_@suffixSalt@:-}" ]; then
     source $cc_wrapper/nix-support/add-flags.sh
 fi
 
+# Only add darwin min version flag and set up `DEVELOPER_DIR` if a default darwin min version is set,
+# which is a signal that we're targeting darwin. (Copied from add-flags in libc but tailored for Swift).
+if [ "@darwinMinVersion@" ]; then
+    # Make sure the wrapped Swift compiler can find the overlays in the SDK.
+    NIX_SWIFTFLAGS_COMPILE+=" -I $SDKROOT/usr/lib/swift"
+    NIX_LDFLAGS_@suffixSalt@+=" -L $SDKROOT/usr/lib/swift"
+fi
+
 if [[ "$isCxx" = 1 ]]; then
     if [[ "$cxxInclude" = 1 ]]; then
         NIX_CFLAGS_COMPILE_@suffixSalt@+=" $NIX_CXXSTDLIB_COMPILE_@suffixSalt@"