diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index e541668..08081c3 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -37,7 +37,8 @@ jobs:
       run: cmd /C 'echo LIBS := -L "c:/program files/openssl/lib" $(LIBS) >>Makefile.win && echo CFLAGS := -I "c:/program files/openssl/include" $(CFLAGS) >>Makefile.win && type Makefile.win'
     - name: SSLPlugin Linux
       if: ${{ startsWith(matrix.target, 'ubuntu') }}
-      run: 'echo PLUGINS := \\$(PLUGINS) SSLPlugin >>Makefile & echo LIBS := \\$(LIBS) -lcrypto -lssl >>Makefile'
+      run: 'sed -i \'/^PLUGIN/s/$ SSLPlugin\' Makefile'
+      run: 'sed -i \'/^LIBS/s/$ -lcrypto -lssl\' Makefile'
     - name: make
       run: make
     - name: mkdir