diff --git a/ci/build-macos.sh b/ci/build-macos.sh
index eef301e5834d6..49c688887989c 100755
--- a/ci/build-macos.sh
+++ b/ci/build-macos.sh
@@ -7,6 +7,17 @@ set -e
 MPV_INSTALL_PREFIX="${HOME}/out/mpv"
 MPV_VARIANT="${TRAVIS_OS_NAME}"
 
+objc_args="-Wno-error=deprecated -Wno-error=deprecated-declarations"
+
+# Homebrew's libraries are built for the macOS version of the runner, so ld
+# warns for each of them when building for an older deployment target. meson
+# 1.12 passes -Wl,-fatal_warnings with werror, so only apply werror to the
+# compilers.
+if [[ -n "${MACOSX_DEPLOYMENT_TARGET}" ]]; then
+    common_args="${common_args/--werror/-Dwerror=false -Dc_args=-Werror}"
+    objc_args="-Werror ${objc_args}"
+fi
+
 if [[ -d "./build/${MPV_VARIANT}" ]] ; then
     rm -rf "./build/${MPV_VARIANT}"
 fi
@@ -14,7 +25,7 @@ fi
 PKG_CONFIG_PATH="$(brew --prefix libarchive)/lib/pkgconfig/" CC="${CC}" CXX="${CXX}" \
 meson setup build $common_args \
   -Dprefix="${MPV_INSTALL_PREFIX}" \
-  -Dobjc_args="-Wno-error=deprecated -Wno-error=deprecated-declarations" \
+  -Dobjc_args="${objc_args}" \
   -D{caca,cdda,dvdnav,gl,iconv,lcms2,libarchive,libbluray,lua,jpeg}=enabled \
   -D{plain-gl,rubberband,zimg,zlib}=enabled \
   -D{cocoa,coreaudio,gl-cocoa,videotoolbox-gl,videotoolbox-pl}=enabled \