cool, guy
But, I’m stuck into jitpack.io yet. 
INFO:minerl.env.malmo.instance.0e17f5:Starting Minecraft process: ['/tmp/tmp__29c0xm/Minecraft/launchClient.sh', '-port', '9001', '-env', '-runDir', '/tmp/tmp__29c0xm/Minecraft/run']
INFO:minerl.env.malmo.instance.0e17f5:Starting process watcher for process 115260 @ localhost:9001
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] DLL init: proxychains-ng 4.14-git-4-g962373e
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] DLL init: proxychains-ng 4.14-git-4-g962373e
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] DLL init: proxychains-ng 4.14-git-4-g962373e
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] DLL init: proxychains-ng 4.14-git-4-g962373e
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] DLL init: proxychains-ng 4.14-git-4-g962373e
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] DLL init: proxychains-ng 4.14-git-4-g962373e
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] DLL init: proxychains-ng 4.14-git-4-g962373e
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] DLL init: proxychains-ng 4.14-git-4-g962373e
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:[proxychains] Strict chain ... 10.21.*.*:3128 ... 10.21.*.*:3128 ... OK
DEBUG:minerl.env.malmo.instance.0e17f5:
DEBUG:minerl.env.malmo.instance.0e17f5:FAILURE: Build failed with an exception.
DEBUG:minerl.env.malmo.instance.0e17f5:
DEBUG:minerl.env.malmo.instance.0e17f5:* What went wrong:
DEBUG:minerl.env.malmo.instance.0e17f5:A problem occurred configuring root project 'Minecraft'.
DEBUG:minerl.env.malmo.instance.0e17f5:> Could not resolve all dependencies for configuration ':classpath'.
DEBUG:minerl.env.malmo.instance.0e17f5: > Could not resolve com.github.SpongePowered:MixinGradle:dcfaf61.
DEBUG:minerl.env.malmo.instance.0e17f5: Required by:
DEBUG:minerl.env.malmo.instance.0e17f5: :Minecraft:unspecified
DEBUG:minerl.env.malmo.instance.0e17f5: > Could not resolve com.github.SpongePowered:MixinGradle:dcfaf61.
DEBUG:minerl.env.malmo.instance.0e17f5: > Could not get resource 'https://jitpack.io/com/github/SpongePowered/MixinGradle/dcfaf61/MixinGradle-dcfaf61.pom'.
DEBUG:minerl.env.malmo.instance.0e17f5: > Could not GET 'https://jitpack.io/com/github/SpongePowered/MixinGradle/dcfaf61/MixinGradle-dcfaf61.pom'.
DEBUG:minerl.env.malmo.instance.0e17f5: > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
DEBUG:minerl.env.malmo.instance.0e17f5: > Could not resolve com.github.SpongePowered:MixinGradle:dcfaf61.
DEBUG:minerl.env.malmo.instance.0e17f5: > Could not get resource 'https://repo1.maven.org/maven2/com/github/SpongePowered/MixinGradle/dcfaf61/MixinGradle-dcfaf61.pom'.
DEBUG:minerl.env.malmo.instance.0e17f5: > Could not GET 'https://repo1.maven.org/maven2/com/github/SpongePowered/MixinGradle/dcfaf61/MixinGradle-dcfaf61.pom'.
DEBUG:minerl.env.malmo.instance.0e17f5: > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
DEBUG:minerl.env.malmo.instance.0e17f5:
This is the same error with the usage of systemProp.http.proxyHost in gradle-wrapper.properties.