Btcz mining zcash

make: Leaving directory '/root/sm/snowgem-solo-mining/node_modules/bignum/build'
gyp ERR! build error
gyp ERR! stack Error: failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:262:23)
gyp ERR! stack at ChildProcess.emit (events.js:182:13)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:254:12)
gyp ERR! System Linux 4.15.0-38-generic
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "build" "--fallback-to-build" "--module=/root/sm/snowgem-solo-mining/node_modules/bignum/binding/bignum.node" "--module_name=bignum" "--module_path=/root/sm/snowgem-solo-mining/node_modules/bignum/binding"
gyp ERR! cwd /root/sm/snowgem-solo-mining/node_modules/bignum
gyp ERR! node -v v11.2.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
bignum.target.mk:103: recipe for target 'Release/obj.target/bignum/bignum.o' failed
make: * [Release/obj.target/bignum/bignum.o] Error 1
make: Leaving directory '/root/sm/snowgem-solo-mining/node_modules/bignum/build'
gyp ERR! build error
gypnode-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute '/usr/local/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js build --fallback-to-build --module=/root/sm/snowgem-solo-mining/node_modules/bignum/binding/bignum.node --module_name=bignum --module_path=/root/sm/snowgem-solo-mining/node_modules/bignum/binding' (1)
node-pre-gyp ERR! stack at ChildProcess.<anonymous> (/root/sm/snowgem-solo-mining/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack at ChildProcess.emit (events.js:182:13)
node-pre-gyp ERR! stack at maybeClose (internal/child_process.js:978:16)
node-pre-gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:265:5)
node-pre-gyp ERR! System Linux 4.15.0-38-generic
node-pre-gyp ERR! command "/usr/local/bin/node" "/root/sm/snowgem-solo-mining/node_modules/.bin/node-pre-gyp" "install" "--fallback-to-build"
node-pre-gyp ERR! cwd /root/sm/snowgem-solo-mining/node_modules/bignum
node-pre-gyp ERR!ERR! stacknode -v v11.2.0
Error: failed with exit code: 2
gyp ERR!node-pre-gyp ERR!stack at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:262:23)
gypnode-pre-gyp -v v0.6.39
node-pre-gyp ERR! stackERR! at ChildProcess.emit (events.js:182:13)
gyp not ok
ERR! stackFailed to execute '/usr/local/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js build --fallback-to-build --module=/root/sm/snowgem-solo-mining/node_modules/bignum/binding/bignum.node --module_name=bignum --module_path=/root/sm/snowgem-solo-mining/node_modules/bignum/binding' (1)
at Process.ChildProcess._handle.onexit (internal/child_process.js:254:12)
gyp ERR! System Linux 4.15.0-38-generic
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "build" "--fallback-to-build" "--module=/root/sm/snowgem-solo-mining/node_modules/bignum/binding/bignum.node" "--module_name=bignum" "--module_path=/root/sm/snowgem-solo-mining/node_modules/bignum/binding"
gyp ERR! cwd /root/sm/snowgem-solo-mining/node_modules/bignum
gyp ERR! node -v v11.2.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! bignum@0.12.5 install:
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the bignum@0.12.5 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2018-12-01T11_10_54_318Z-debug.log
I got this by complining snowgem-mining-pool help needed