node-sass: Build fails on OpenBSD - How to fix

> node-sass@4.12.0 postinstall $APP_DIR/node_modules/node-sass > node scripts/build.js  Building: node $APP_DIR/node_modules/node-gyp/bin/node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library= gyp info it worked if it ends with ok gyp info using node-gyp@3.8.0 gyp info using node@12.16.1 | openbsd | x64 gyp http GET https://nodejs.org/download/release/v12.16.1/node-v12.16.1-headers.tar.gz gyp http 200 https://nodejs.org/download/release/v12.16.1/node-v12.16.1-headers.tar.gz gyp http GET https://nodejs.org/download/release/v12.16.1/SHASUMS256.txt gyp http 200 https://nodejs.org/download/release/v12.16.1/SHASUMS256.txt gyp info spawn /usr/local/bin/python2 gyp info spawn args [ gyp info spawn args '$APP_DIR/node_modules/node-gyp/gyp/gyp_main.py', gyp info spawn args 'binding.gyp', gyp info spawn args '-f', gyp info spawn args 'make', gyp info spawn args '-I', gyp info spawn args '$APP_DIR/node_modules/node-sass/build/config.gypi', gyp info spawn args '-I', gyp info spawn args '$APP_DIR/node_modules/node-gyp/addon.gypi', gyp info spawn args '-I', gyp info spawn args '$HOME_DIR/.node-gyp/12.16.1/include/node/common.gypi', gyp info spawn args '-Dlibrary=shared_library', gyp info spawn args '-Dvisibility=default', gyp info spawn args '-Dnode_root_dir=$HOME_DIR/.node-gyp/12.16.1', gyp info spawn args '-Dnode_gyp_dir=$APP_DIR/node_modules/node-gyp', gyp info spawn args '-Dnode_lib_file=$HOME_DIR/.node-gyp/12.16.1/<(target_arch)/node.lib', gyp info spawn args '-Dmodule_root_dir=$APP_DIR/node_modules/node-sass', gyp info spawn args '-Dnode_engine=v8', gyp info spawn args '--depth=.', gyp info spawn args '--no-parallel', gyp info spawn args '--generator-output', gyp info spawn args 'build', gyp info spawn args '-Goutput_dir=.' gyp info spawn args ] gyp info spawn gmake gyp info spawn args [ 'V=1', 'BUILDTYPE=Release', '-C', 'build' ] gmake: Entering directory '$APP_DIR/node_modules/node-sass/build'  g++ '-DNODE_GYP_MODULE_NAME=libsass' '-DUSING_UV_SHARED=1' '-DUSING_V8_SHARED=1' '-DV8_DEPRECATION_WARNINGS=1' '-DV8_DEPRECATION_WARNINGS' '-DV8_IMMINENT_DEPRECATION_WARNINGS' '-D_LARGEFILE_SOURCE' '-D_FILE_OFFSET_BITS=64' '-D__STDC_FORMAT_MACROS' '-DOPENSSL_NO_PINSHARED' '-DOPENSSL_THREADS' '-DLIBSASS_VERSION="3.5.4"' -I$HOME_DIR/.node-gyp/12.16.1/include/node -I$HOME_DIR/.node-gyp/12.16.1/src -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/config -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/openssl/include -I$HOME_DIR/.node-gyp/12.16.1/deps/uv/include -I$HOME_DIR/.node-gyp/12.16.1/deps/zlib -I$HOME_DIR/.node-gyp/12.16.1/deps/v8/include -I../src/libsass/include -fPIC -pthread -Wall -Wextra -Wno-unused-parameter -m64 -I/usr/local/include -O3 -fno-omit-frame-pointer -std=gnu++1y -std=c++0x -fexceptions -frtti -MMD -MF ./Release/.deps/Release/obj.target/libsass/src/libsass/src/ast.o.d.raw -c -o Release/obj.target/libsass/src/libsass/src/ast.o ../src/libsass/src/ast.cpp cc1plus: error: unrecognized command line option "-std=gnu++1y" cc1plus: error: unrecognized command line option "-std=c++0x" gmake: *** [src/libsass.target.mk:162: Release/obj.target/libsass/src/libsass/src/ast.o] Error 1 gmake: Leaving directory '$APP_DIR/node_modules/node-sass/build' gyp ERR! build error gyp ERR! stack Error: `gmake` failed with exit code: 2 gyp ERR! stack at ChildProcess.onExit ($APP_DIR/node_modules/node-gyp/lib/build.js:262:23) gyp ERR! stack at ChildProcess.emit (events.js:311:20) gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12) gyp ERR! System OpenBSD 6.7 gyp ERR! command "node" "$APP_DIR/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library=" gyp ERR! cwd $APP_DIR/node_modules/node-sass gyp ERR! node -v v12.16.1 gyp ERR! node-gyp -v v3.8.0 gyp ERR! not ok Build failed with error code: 1 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules/fsevents): npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"openbsd","arch":"x64"}) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! node-sass@4.12.0 postinstall: `node scripts/build.js` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the node-sass@4.12.0 postinstall script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above. 

$ # case npm: $ env CXX=/usr/bin/clang++ npm install node-sass  $ # case yarn: $ env CXX=/usr/bin/clang++ yarn install node-sass 

gypgmake: Entering directory '$APP_DIR/node_modules/node-sass/build'  info /usr/bin/clang++ '-DNODE_GYP_MODULE_NAME=libsass' '-DUSING_UV_SHARED=1' '-DUSING_V8_SHARED=1' '-DV8_DEPRECATION_WARNINGS=1' '-DV8_DEPRECATION_WARNINGS' '-DV8_IMMINENT_DEPRECATION_WARNINGS' '-D_LARGEFILE_SOURCE' '-D_FILE_OFFSET_BITS=64' '-D__STDC_FORMAT_MACROS' '-DOPENSSL_NO_PINSHARED' '-DOPENSSL_THREADS' '-DLIBSASS_VERSION="3.5.4"' -I$HOME_DIR/.node-gyp/12.16.1/include/node -I$HOME_DIR/.node-gyp/12.16.1/src -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/config -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/openssl/include -I$HOME_DIR/.node-gyp/12.16.1/deps/uv/include -I$HOME_DIR/.node-gyp/12.16.1/deps/zlib -I$HOME_DIR/.node-gyp/12.16.1/deps/v8/include -I../src/libsass/include -fPIC -pthread -Wall -Wextra -Wno-unused-parameter -m64 -I/usr/local/include -O3 -fno-omit-frame-pointer -std=gnu++1y -std=c++0x -fexceptions -frtti -MMD -MF ./Release/.deps/Release/obj.target/libsass/src/libsass/src/ast.o.d.raw -c -o Release/obj.target/libsass/src/libsass/src/ast.o ../src/libsass/src/ast.cpp spawn gmake gyp info spawn args [ 'V=1', 'BUILDTYPE=Release', '-C', 'build' ]  /usr/bin/clang++ '-DNODE_GYP_MODULE_NAME=libsass' '-DUSING_UV_SHARED=1' '-DUSING_V8_SHARED=1' '-DV8_DEPRECATION_WARNINGS=1' '-DV8_DEPRECATION_WARNINGS' '-DV8_IMMINENT_DEPRECATION_WARNINGS' '-D_LARGEFILE_SOURCE' '-D_FILE_OFFSET_BITS=64' '-D__STDC_FORMAT_MACROS' '-DOPENSSL_NO_PINSHARED' '-DOPENSSL_THREADS' '-DLIBSASS_VERSION="3.5.4"' -I$HOME_DIR/.node-gyp/12.16.1/include/node -I$HOME_DIR/.node-gyp/12.16.1/src -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/config -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/openssl/include -I$HOME_DIR/.node-gyp/12.16.1/deps/uv/include -I$HOME_DIR/.node-gyp/12.16.1/deps/zlib -I$HOME_DIR/.node-gyp/12.16.1/deps/v8/include -I../src/libsass/include -fPIC -pthread -Wall -Wextra -Wno-unused-parameter -m64 -I/usr/local/include -O3 -fno-omit-frame-pointer -std=gnu++1y -std=c++0x -fexceptions -frtti -MMD -MF ./Release/.deps/Release/obj.target/libsass/src/libsass/src/ast_fwd_decl.o.d.raw -c -o Release/obj.target/libsass/src/libsass/src/ast_fwd_decl.o ../src/libsass/src/ast_fwd_decl.cpp  ...  cc '-DNODE_GYP_MODULE_NAME=libsass' '-DUSING_UV_SHARED=1' '-DUSING_V8_SHARED=1' '-DV8_DEPRECATION_WARNINGS=1' '-DV8_DEPRECATION_WARNINGS' '-DV8_IMMINENT_DEPRECATION_WARNINGS' '-D_LARGEFILE_SOURCE' '-D_FILE_OFFSET_BITS=64' '-D__STDC_FORMAT_MACROS' '-DOPENSSL_NO_PINSHARED' '-DOPENSSL_THREADS' '-DLIBSASS_VERSION="3.5.4"' -I$HOME_DIR/.node-gyp/12.16.1/include/node -I$HOME_DIR/.node-gyp/12.16.1/src -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/config -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/openssl/include -I$HOME_DIR/.node-gyp/12.16.1/deps/uv/include -I$HOME_DIR/.node-gyp/12.16.1/deps/zlib -I$HOME_DIR/.node-gyp/12.16.1/deps/v8/include -I../src/libsass/include -fPIC -pthread -Wall -Wextra -Wno-unused-parameter -m64 -I/usr/local/include -O3 -fno-omit-frame-pointer -MMD -MF ./Release/.deps/Release/obj.target/libsass/src/libsass/src/cencode.o.d.raw -c -o Release/obj.target/libsass/src/libsass/src/cencode.o ../src/libsass/src/cencode.c  /usr/bin/clang++ '-DNODE_GYP_MODULE_NAME=libsass' '-DUSING_UV_SHARED=1' '-DUSING_V8_SHARED=1' '-DV8_DEPRECATION_WARNINGS=1' '-DV8_DEPRECATION_WARNINGS' '-DV8_IMMINENT_DEPRECATION_WARNINGS' '-D_LARGEFILE_SOURCE' '-D_FILE_OFFSET_BITS=64' '-D__STDC_FORMAT_MACROS' '-DOPENSSL_NO_PINSHARED' '-DOPENSSL_THREADS' '-DLIBSASS_VERSION="3.5.4"' -I$HOME_DIR/.node-gyp/12.16.1/include/node -I$HOME_DIR/.node-gyp/12.16.1/src -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/config -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/openssl/include -I$HOME_DIR/.node-gyp/12.16.1/deps/uv/include -I$HOME_DIR/.node-gyp/12.16.1/deps/zlib -I$HOME_DIR/.node-gyp/12.16.1/deps/v8/include -I../src/libsass/include -fPIC -pthread -Wall -Wextra -Wno-unused-parameter -m64 -I/usr/local/include -O3 -fno-omit-frame-pointer -std=gnu++1y -std=c++0x -fexceptions -frtti -MMD -MF ./Release/.deps/Release/obj.target/libsass/src/libsass/src/check_nesting.o.d.raw -c -o Release/obj.target/libsass/src/libsass/src/check_nesting.o ../src/libsass/src/check_nesting.cpp  ...  rm -f Release/obj.target/src/sass.a && ar crs Release/obj.target/src/sass.a Release/obj.target/libsass/src/libsass/src/ast.o Release/obj.target/libsass/src/libsass/src/ast_fwd_decl.o Release/obj.target/libsass/src/libsass/src/backtrace.o Release/obj.target/libsass/src/libsass/src/base64vlq.o Release/obj.target/libsass/src/libsass/src/bind.o Release/obj.target/libsass/src/libsass/src/cencode.o Release/obj.target/libsass/src/libsass/src/check_nesting.o Release/obj.target/libsass/src/libsass/src/color_maps.o Release/obj.target/libsass/src/libsass/src/constants.o Release/obj.target/libsass/src/libsass/src/context.o Release/obj.target/libsass/src/libsass/src/cssize.o Release/obj.target/libsass/src/libsass/src/emitter.o Release/obj.target/libsass/src/libsass/src/environment.o Release/obj.target/libsass/src/libsass/src/error_handling.o Release/obj.target/libsass/src/libsass/src/eval.o Release/obj.target/libsass/src/libsass/src/expand.o Release/obj.target/libsass/src/libsass/src/extend.o Release/obj.target/libsass/src/libsass/src/file.o Release/obj.target/libsass/src/libsass/src/functions.o Release/obj.target/libsass/src/libsass/src/inspect.o Release/obj.target/libsass/src/libsass/src/json.o Release/obj.target/libsass/src/libsass/src/lexer.o Release/obj.target/libsass/src/libsass/src/listize.o Release/obj.target/libsass/src/libsass/src/memory/SharedPtr.o Release/obj.target/libsass/src/libsass/src/node.o Release/obj.target/libsass/src/libsass/src/operators.o Release/obj.target/libsass/src/libsass/src/output.o Release/obj.target/libsass/src/libsass/src/parser.o Release/obj.target/libsass/src/libsass/src/plugins.o Release/obj.target/libsass/src/libsass/src/position.o Release/obj.target/libsass/src/libsass/src/prelexer.o Release/obj.target/libsass/src/libsass/src/remove_placeholders.o Release/obj.target/libsass/src/libsass/src/sass.o Release/obj.target/libsass/src/libsass/src/sass2scss.o Release/obj.target/libsass/src/libsass/src/sass_context.o Release/obj.target/libsass/src/libsass/src/sass_functions.o Release/obj.target/libsass/src/libsass/src/sass_util.o Release/obj.target/libsass/src/libsass/src/sass_values.o Release/obj.target/libsass/src/libsass/src/source_map.o Release/obj.target/libsass/src/libsass/src/subset_map.o Release/obj.target/libsass/src/libsass/src/to_c.o Release/obj.target/libsass/src/libsass/src/to_value.o Release/obj.target/libsass/src/libsass/src/units.o Release/obj.target/libsass/src/libsass/src/utf8_string.o Release/obj.target/libsass/src/libsass/src/util.o Release/obj.target/libsass/src/libsass/src/values.o rm -rf "Release/sass.a" && cp -pPRf "Release/obj.target/src/sass.a" "Release/sass.a"  /usr/bin/clang++ '-DNODE_GYP_MODULE_NAME=binding' '-DUSING_UV_SHARED=1' '-DUSING_V8_SHARED=1' '-DV8_DEPRECATION_WARNINGS=1' '-DV8_DEPRECATION_WARNINGS' '-DV8_IMMINENT_DEPRECATION_WARNINGS' '-D_LARGEFILE_SOURCE' '-D_FILE_OFFSET_BITS=64' '-D__STDC_FORMAT_MACROS' '-DOPENSSL_NO_PINSHARED' '-DOPENSSL_THREADS' '-DBUILDING_NODE_EXTENSION' -I$HOME_DIR/.node-gyp/12.16.1/include/node -I$HOME_DIR/.node-gyp/12.16.1/src -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/config -I$HOME_DIR/.node-gyp/12.16.1/deps/openssl/openssl/include -I$HOME_DIR/.node-gyp/12.16.1/deps/uv/include -I$HOME_DIR/.node-gyp/12.16.1/deps/zlib -I$HOME_DIR/.node-gyp/12.16.1/deps/v8/include -I../../nan -I../src/libsass/include -fPIC -pthread -Wall -Wextra -Wno-unused-parameter -m64 -I/usr/local/include -O3 -fno-omit-frame-pointer -fno-rtti -fno-exceptions -std=gnu++1y -std=c++0x -MMD -MF ./Release/.deps/Release/obj.target/binding/src/binding.o.d.raw -c -o Release/obj.target/binding/src/binding.o ../src/binding.cpp  ...  /usr/bin/clang++ -shared -pthread -rdynamic -m64 -Wl,-z,wxneeded -Wl,-soname=binding.node -o Release/obj.target/binding.node -Wl,--start-group Release/obj.target/binding/src/binding.o Release/obj.target/binding/src/create_string.o Release/obj.target/binding/src/custom_function_bridge.o Release/obj.target/binding/src/custom_importer_bridge.o Release/obj.target/binding/src/sass_context_wrapper.o Release/obj.target/binding/src/sass_types/boolean.o Release/obj.target/binding/src/sass_types/color.o Release/obj.target/binding/src/sass_types/error.o Release/obj.target/binding/src/sass_types/factory.o Release/obj.target/binding/src/sass_types/list.o Release/obj.target/binding/src/sass_types/map.o Release/obj.target/binding/src/sass_types/null.o Release/obj.target/binding/src/sass_types/number.o Release/obj.target/binding/src/sass_types/string.o Release/obj.target/src/sass.a -Wl,--end-group rm -rf "Release/binding.node" && cp -pPRf "Release/obj.target/binding.node" "Release/binding.node" gmake: Leaving directory '$APP_DIR/node_modules/node-sass/build' gyp info ok Installed to $APP_DIR/node_modules/node-sass/vendor/openbsd-x64-72/binding.node 

$ # case export: $ export CXX=/usr/bin/clang++ $ npm install node-sass 

$ # case alias: $ alias npm='env CXX=/usr/bin/clang++ npm' $ npm install node-sass