ci: small macOS cleanups

Reduce differences with the configuration used on koreader-base.

.github/workflows/build.yml

@@ -30,13 +30,12 @@ jobs:
           show-progress: false
 
       - name: Homebrew install dependencies
-        # Compared to the README, adds ccache for faster compilation times
-        # Compared to the emulator, adds p7zip.
+        # Compared to the README, adds p7zip.
         run: |
           packages=(
             nasm binutils coreutils libtool autoconf automake cmake makedepend
             sdl2 lua@5.1 luarocks gettext pkg-config wget gnu-getopt grep bison
-            ccache p7zip
+            p7zip
           )
           # Lua 5.1 is disabled, so we need to work around that:
           # - fetch all packages
@@ -48,10 +47,18 @@ jobs:
           # - and install the rest
           brew install "${packages[@]}"
 
+      - name: Update PATH
+        run: |
+          printf '%s\n' \
+            "$(brew --prefix)/opt/bison/bin" \
+            "$(brew --prefix)/opt/gettext/bin" \
+            "$(brew --prefix)/opt/gnu-getopt/bin" \
+            "$(brew --prefix)/opt/grep/libexec/gnubin" \
+            >>"${GITHUB_PATH}"
+
       - name: Building in progress…
         run: |
           export MACOSX_DEPLOYMENT_TARGET=10.15;
-          export PATH="$(brew --prefix)/opt/gettext/bin:$(brew --prefix)/opt/gnu-getopt/bin:$(brew --prefix)/opt/bison/bin:$(brew --prefix)/opt/grep/libexec/gnubin:${PATH}";
           ./kodev release macos
 
       - name: Uploading artifacts