Fix mac build (#663)

.github/workflows/build.yml

@@ -123,13 +123,13 @@ jobs:
           brew update
 
           # this errors because it installs python3 but python2 is already installed
-          brew install gtk+3 pkg-config gobject-introspection libffi || true
+          brew install gtk+3 pkg-config gobject-introspection libffi gettext || true
 
           export LDFLAGS="-L/usr/local/opt/libffi/lib"
           export PKG_CONFIG_PATH="/usr/local/opt/libffi/lib/pkgconfig"
           
           # for msgfmt
-          brew link gettext --force
+          echo "::add-path::/usr/local/opt/gettext/bin"
 
           echo "::set-env name=GI_TYPELIB_PATH::/usr/local/lib/girepository-1.0/"
 
@@ -142,7 +142,7 @@ jobs:
           rm inkscape-0.92.3.tar.bz2
           mv inkscape-0.92.3 inkscape
 
-          echo "::add-path::${{ env.pythonLocation }}\bin"
+          echo "::add-path::${{ env.pythonLocation }}/bin"
       - shell: bash
         run: |
           make dist