diff --git a/pkgs/development/compilers/swift/compiler/default.nix b/pkgs/development/compilers/swift/compiler/default.nix
index 31cbd298603a..e4a15321fb09 100644
--- a/pkgs/development/compilers/swift/compiler/default.nix
+++ b/pkgs/development/compilers/swift/compiler/default.nix
@@ -13,6 +13,7 @@
 , python3Packages
 , git
 , fetchpatch
+, fetchpatch2
 , makeWrapper
 , gnumake
 , file
@@ -302,6 +303,32 @@ in stdenv.mkDerivation {
 
     patch -p1 -d llvm-project/llvm -i ${./patches/llvm-module-cache.patch}
 
+    for lldbPatch in ${lib.escapeShellArgs [
+      # Fixes for SWIG 4
+      (fetchpatch2 {
+        url = "https://github.com/llvm/llvm-project/commit/81fc5f7909a4ef5a8d4b5da2a10f77f7cb01ba63.patch?full_index=1";
+        stripLen = 1;
+        hash = "sha256-Znw+C0uEw7lGETQLKPBZV/Ymo2UigZS+Hv/j1mUo7p0=";
+      })
+      (fetchpatch2 {
+        url = "https://github.com/llvm/llvm-project/commit/f0a25fe0b746f56295d5c02116ba28d2f965c175.patch?full_index=1";
+        stripLen = 1;
+        hash = "sha256-QzVeZzmc99xIMiO7n//b+RNAvmxghISKQD93U2zOgFI=";
+      })
+      (fetchpatch2 {
+        url = "https://github.com/llvm/llvm-project/commit/ba35c27ec9aa9807f5b4be2a0c33ca9b045accc7.patch?full_index=1";
+        stripLen = 1;
+        hash = "sha256-LXl+WbpmWZww5xMDrle3BM2Tw56v8k9LO1f1Z1/wDTs=";
+      })
+      (fetchpatch2 {
+        url = "https://github.com/llvm/llvm-project/commit/9ec115978ea2bdfc60800cd3c21264341cdc8b0a.patch?full_index=1";
+        stripLen = 1;
+        hash = "sha256-u0zSejEjfrH3ZoMFm1j+NVv2t5AP9cE5yhsrdTS1dG4=";
+      })
+    ]}; do
+      patch -p1 -d llvm-project/lldb -i $lldbPatch
+    done
+
     patch -p1 -d llvm-project/clang -i ${./patches/clang-toolchain-dir.patch}
     patch -p1 -d llvm-project/clang -i ${./patches/clang-wrap.patch}
     patch -p1 -d llvm-project/clang -i ${../../llvm/12/clang/purity.patch}