diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 8da599a932..2efb98e263 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -120,7 +120,17 @@ jobs:
 
       - name: install boost
         run: |
-          brew install boost-build boost
+          git clone --depth=1 --recurse-submodules -j10 --branch=boost-1.78.0 https://github.com/boostorg/boost.git
+          cd boost
+          bootstrap.sh
+
+      - name: boost headers
+        run: |
+          cd boost
+          .\b2 headers
+
+      - name: user-config
+        run: |
           echo "using darwin : ios_sim : clang++ : <compileflags>-Wno-deprecated-declarations
           <compileflags>\"-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk\"
           <compileflags>-mios-simulator-version-min=7
@@ -141,4 +151,4 @@ jobs:
 
       - name: build library
         run: |
-          b2 -l400 cxxstd=14 target-os=iphone darwin-ios darwin-ios_sim address-model=64  link=static
+          BOOST_ROOT=boost b2 -l400 cxxstd=14 target-os=iphone darwin-ios darwin-ios_sim address-model=64  link=static