diff --git a/wasi-libc++/.signature b/wasi-libc++/.signature
index 5772fad64..a93edc23f 100644
--- a/wasi-libc++/.signature
+++ b/wasi-libc++/.signature
@@ -1,6 +1,6 @@
 untrusted comment: verify with /etc/ports/contrib.pub
-RWSagIOpLGJF3zXzKdu9XWzxY2p/Tweo6i4U58jp44eUe48JtVLO6Prqa/KPxGC293FMMsqSMGf5oCSRsfz3oceMw4mx6UO0qg8=
-SHA256 (Pkgfile) = 78982777a90c47e24e098a488264564eee25f7b7116fb4c6ac8d8e9f918a7728
+RWSagIOpLGJF39RnrcIa4mx2Z9PutJ4KqWVFO80secQ3oWMVqwzaj92QMzvLAtPLvuHPjuJGdFAF07s6urx3TTllGTTc87FvpwE=
+SHA256 (Pkgfile) = 97b974c3d513766296af677a325d95af1efaf7552b1704b65aa11d205713ee0c
 SHA256 (.footprint) = fe0e3637f7d036d7692f0024a865c4732f7ae8a7a619059df72fc7f0a95fbe23
-SHA256 (llvm-project-18.1.3.src.tar.xz) = 2929f62d69dec0379e529eb632c40e15191e36f3bd58c2cb2df0413a0dc48651
+SHA256 (llvm-project-18.1.4.src.tar.xz) = 2c01b2fbb06819a12a92056a7fd4edcdc385837942b5e5260b9c2c0baff5116b
 SHA256 (wasi-sdk.cmake) = 22a5ee26eb8367ac9d35a9431f4ac0a8e64dcb372bfd55be8665d35200d70917
diff --git a/wasi-libc++/Pkgfile b/wasi-libc++/Pkgfile
index aec7206de..665690e1f 100644
--- a/wasi-libc++/Pkgfile
+++ b/wasi-libc++/Pkgfile
@@ -4,7 +4,7 @@
 # Depends on: wasi-compiler-rt
 
 name=wasi-libc++
-version=18.1.3
+version=18.1.4
 release=1
 source=(https://github.com/llvm/llvm-project/releases/download/llvmorg-$version/llvm-project-$version.src.tar.xz
   wasi-sdk.cmake)
@@ -49,7 +49,7 @@ build() {
     -D UNIX=ON \
     -D WASI_SDK_PREFIX=/usr
 
-  ninja -C build cxx cxxabi
+  ninja -C build -j ${JOBS:-1} cxx cxxabi
   DESTDIR="$PKG" ninja -C build install-cxx install-cxxabi
 
   cd "$PKG"/usr/share/wasi-sysroot/lib/wasm32-wasi