ensure cmake is proper version

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install build-essential
+          sudo apt-get install build-essential cmake
 
       - name: Build
         run: |

build.sh

@@ -13,7 +13,8 @@ if [ ! -f libsentencepiece.a ]
 then
     tar xzvf v0.1.97.tar.gz
     cd sentencepiece-0.1.97/ && rm -rf build && mkdir build && cd build
-    cmake -E env CXXFLAGS="-std=c++17" cmake ..
+    cmake --version
+    cmake ..
     make sentencepiece-static -j $(nproc)
     cd ../..
     cp sentencepiece-0.1.97/build/src/libsentencepiece.a ./