1 files changed, 4 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/development/compilers/swift/swift-driver/default.nix b/nixpkgs/pkgs/development/compilers/swift/swift-driver/default.nix
index 60fe2aeb9c92..d69a4da0eb3e 100644
--- a/nixpkgs/pkgs/development/compilers/swift/swift-driver/default.nix
+++ b/nixpkgs/pkgs/development/compilers/swift/swift-driver/default.nix
@@ -52,7 +52,10 @@ stdenv.mkDerivation {
     })
   ];
 
-  configurePhase = generated.configure;
+  configurePhase = generated.configure + ''
+    swiftpmMakeMutable swift-tools-support-core
+    patch -p1 -d .build/checkouts/swift-tools-support-core -i ${./patches/force-unwrap-file-handles.patch}
+  '';
 
   # TODO: Tests depend on indexstore-db being provided by an existing Swift
   # toolchain. (ie. looks for `../lib/libIndexStore.so` relative to swiftc.