diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ca2af4c4..526e55fd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -48,7 +48,7 @@ jobs:
 
           # Statically link to libstdc++ on Ubuntu 18.04 as we're compiling
           # with a newer version of g++ than what's in the default repos
-          meson setup --buildtype=release --cross-file=cross-wine.conf --unity=on --unity_size=10000 -Dwith-static-boost=true -Dwith-bitbridge=true  -Dcpp_link_args='-static-libstdc++' -Dbuild.cpp_link_args='-static-libstdc++' build
+          meson setup --buildtype=release --cross-file=cross-wine.conf --unity=on --unity-size=10000 -Dwith-static-boost=true -Dwith-bitbridge=true  -Dcpp_link_args='-static-libstdc++' -Dbuild.cpp_link_args='-static-libstdc++' build
           ninja -C build
       - name: Create an archive for the binaries
         run: |
@@ -87,7 +87,7 @@ jobs:
           mkdir -p /tmp/prefix
           export WINEPREFIX=/tmp/prefix
 
-          meson setup --buildtype=release --cross-file=cross-wine.conf --unity=on --unity_size=10000 -Dwith-static-boost=true -Dwith-bitbridge=true build
+          meson setup --buildtype=release --cross-file=cross-wine.conf --unity=on --unity-size=10000 -Dwith-static-boost=true -Dwith-bitbridge=true build
           ninja -C build
       - name: Create an archive for the binaries
         run: |