pi@raspberrypi:~ $ npm -v
6.14.8
pi@raspberrypi:~ $  node -v
v12.18.3
pi@raspberrypi:~ $  nodejs -v
v12.18.3

pi@raspberrypi:~ $ npm i iobroker.vodafone-speedtest
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated har-validator@5.1.5: this library is no longer supported

> node-libcurl@2.2.0 install /home/pi/node_modules/node-libcurl
> node-pre-gyp install --fallback-to-build

node-pre-gyp WARN Using request for node-pre-gyp https download
node-pre-gyp WARN Tried to download(404): https://github.com/JCMais/node-libcurl/releases/download/v2.2.0/node_libcurl-v2.2.0-node-v72-linux-arm-glibc.tar.gz
node-pre-gyp WARN Pre-built binaries not found for node-libcurl@2.2.0 and node@12.18.3 (node-v72 ABI, glibc) (falling back to source compile with node-gyp)
Could not run curl-config, please make sure libcurl dev package is installed.
Output: /bin/sh: 1: curl-config: not found

gyp: Call to 'node /home/pi/node_modules/node-libcurl/tools/curl-config.js --prefix' returned exit status 1 while in binding.gyp. while trying to load binding.gyp
gyp ERR! configure error
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/usr/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:351:16)
gyp ERR! stack     at ChildProcess.emit (events.js:315:20)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)
gyp ERR! System Linux 5.4.51-v7l+
gyp ERR! command "/usr/bin/node" "/usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "--fallback-to-build" "--module=/home/pi/node_modules/node-libcurl/lib/binding/node_libcurl.node" "--module_name=node_libcurl" "--module_path=/home/pi/node_modules/node-libcurl/lib/binding" "--napi_version=6" "--node_abi_napi=napi" "--napi_build_version=0" "--node_napi_label=node-v72"
gyp ERR! cwd /home/pi/node_modules/node-libcurl
gyp ERR! node -v v12.18.3
gyp ERR! node-gyp -v v5.1.0
gyp ERR! not ok
node-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute '/usr/bin/node /usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/home/pi/node_modules/node-libcurl/lib/binding/node_libcurl.node --module_name=node_libcurl --module_path=/home/pi/node_modules/node-libcurl/lib/binding --napi_version=6 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v72' (1)
node-pre-gyp ERR! stack     at ChildProcess.<anonymous> (/home/pi/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack     at ChildProcess.emit (events.js:315:20)
node-pre-gyp ERR! stack     at maybeClose (internal/child_process.js:1021:16)
node-pre-gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:286:5)
node-pre-gyp ERR! System Linux 5.4.51-v7l+
node-pre-gyp ERR! command "/usr/bin/node" "/home/pi/node_modules/.bin/node-pre-gyp" "install" "--fallback-to-build"
node-pre-gyp ERR! cwd /home/pi/node_modules/node-libcurl
node-pre-gyp ERR! node -v v12.18.3
node-pre-gyp ERR! node-pre-gyp -v v0.15.0
node-pre-gyp ERR! not ok
Failed to execute '/usr/bin/node /usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/home/pi/node_modules/node-libcurl/lib/binding/node_libcurl.node --module_name=node_libcurl --module_path=/home/pi/node_modules/node-libcurl/lib/binding --napi_version=6 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v72' (1)
npm WARN enoent ENOENT: no such file or directory, open '/home/pi/package.json'
npm WARN pi No description
npm WARN pi No repository field.
npm WARN pi No README data
npm WARN pi No license field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-libcurl@2.2.0 install: `node-pre-gyp install --fallback-to-build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-libcurl@2.2.0 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!     /home/pi/.npm/_logs/2020-09-09T11_02_52_053Z-debug.log
pi@raspberrypi:~ $