diff --git a/.github/actions/build/action.yml b/.github/actions/build/action.yml
index 27001b8ed..b8191d54b 100644
--- a/.github/actions/build/action.yml
+++ b/.github/actions/build/action.yml
@@ -56,7 +56,7 @@ runs:
         tar xf gmp-6.2.1.tar.xz && 
         mkdir dynamic_gmp && mkdir static_gmp && 
         pushd . && 
-        cd gmp-6.2.1 && ./configure CPPFLAGS=-I$pwd/gmp-6.2.1 --host=x86_64-w64-mingw32 --build=i686-pc-cygwin --enable-shared --disable-static --prefix=$pwd/dynamic_gmp &&
+        cd gmp-6.2.1 && ./configure CPPFLAGS=-I'$pwd'/gmp-6.2.1 --host=x86_64-w64-mingw32 --build=i686-pc-cygwin --enable-shared --disable-static --prefix=$pwd/dynamic_gmp &&
         make && make install && 
         make clean && ./configure --host=x86_64-w64-mingw32 --build=i686-pc-cygwin --enable-static --disable-shared --prefix=$pwd/static_gmp && 
         make && make install &&