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Technic can't launch any pack because `env` is not found

SSUPII

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SSUPII Dirt

SSUPII

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[B#695] Running /usr/bin/env __VK_LAYER_NV_optimus=NVIDIA_only __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia /media/sergio/SAMSUNG/Games/Technic/technic/runtimes/jre-legacy/bin/java -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M -Xms6144m -Xmx6144m -Djava.library.path=/media/sergio/SAMSUNG/Games/Technic/technic/modpacks/yaopack/bin/natives -Dfml.core.libraries.mirror=http://mirror.technicpack.net/Technic/lib/fml/%s -Dfml.ignoreInvalidMinecraftCertificates=true -Dfml.ignorePatchDiscrepancies=true -Dminecraft.applet.TargetDirectory=/media/sergio/SAMSUNG/Games/Technic/technic/modpacks/yaopack -Duser.language=en -cp /media/sergio/SAMSUNG/Games/Technic/technic/cache/net/minecraft/launchwrapper/1.12/launchwrapper-1.12.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/ow2/asm/asm-all/5.2/asm-all-5.2.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/jline/jline/3.5.1/jline-3.5.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/typesafe/akka/akka-actor_2.11/2.3.3/akka-actor_2.11-2.3.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/typesafe/config/1.2.1/config-1.2.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/scala-actors-migration_2.11/1.1.0/scala-actors-migration_2.11-1.1.0.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/scala-compiler/2.11.1/scala-compiler-2.11.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/plugins/scala-continuations-library_2.11/1.0.2/scala-continuations-library_2.11-1.0.2.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/plugins/scala-continuations-plugin_2.11.1/1.0.2/scala-continuations-plugin_2.11.1-1.0.2.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/scala-library/2.11.1/scala-library-2.11.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/scala-parser-combinators_2.11/1.0.1/scala-parser-combinators_2.11-1.0.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/scala-reflect/2.11.1/scala-reflect-2.11.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/scala-swing_2.11/1.0.1/scala-swing_2.11-1.0.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/scala-lang/scala-xml_2.11/1.0.2/scala-xml_2.11-1.0.2.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/lzma/lzma/0.0.1/lzma-0.0.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/net/sf/jopt-simple/jopt-simple/5.0.3/jopt-simple-5.0.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/java3d/vecmath/1.5.2/vecmath-1.5.2.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/net/sf/trove4j/trove4j/3.0.3/trove4j-3.0.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/apache/maven/maven-artifact/3.5.3/maven-artifact-3.5.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/mojang/patchy/1.2.3/patchy-1.2.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/oshi-project/oshi-core/1.1/oshi-core-1.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/net/java/dev/jna/platform/3.4.0/platform-3.4.0.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/net/sf/jopt-simple/jopt-simple/5.0.3/jopt-simple-5.0.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/paulscode/codecjorbis/20101023/codecjorbis-20101023.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/paulscode/codecwav/20101023/codecwav-20101023.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/paulscode/libraryjavasound/20101123/libraryjavasound-20101123.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/paulscode/librarylwjglopenal/20100824/librarylwjglopenal-20100824.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/paulscode/soundsystem/20120107/soundsystem-20120107.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/io/netty/netty-all/4.1.9.Final/netty-all-4.1.9.Final.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/google/guava/guava/21.0/guava-21.0.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/apache/commons/commons-lang3/3.5/commons-lang3-3.5.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/commons-io/commons-io/2.5/commons-io-2.5.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/commons-codec/commons-codec/1.10/commons-codec-1.10.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/google/code/gson/gson/2.8.0/gson-2.8.0.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/mojang/authlib/1.5.25/authlib-1.5.25.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/mojang/realms/1.10.22/realms-1.10.22.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/apache/commons/commons-compress/1.8.1/commons-compress-1.8.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/it/unimi/dsi/fastutil/7.1.0/fastutil-7.1.0.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/apache/logging/log4j/log4j-api/2.8.1/log4j-api-2.8.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/apache/logging/log4j/log4j-core/2.8.1/log4j-core-2.8.1.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/lwjgl/lwjgl/lwjgl/2.9.4-nightly-20150209/lwjgl-2.9.4-nightly-20150209.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/org/lwjgl/lwjgl/lwjgl_util/2.9.4-nightly-20150209/lwjgl_util-2.9.4-nightly-20150209.jar:/media/sergio/SAMSUNG/Games/Technic/technic/cache/com/mojang/text2speech/1.10.3/text2speech-1.10.3.jar:/media/sergio/SAMSUNG/Games/Technic/technic/modpacks/yaopack/bin/modpack.jar:/media/sergio/SAMSUNG/Games/Technic/technic/modpacks/yaopack/bin/minecraft.jar net.minecraft.launchwrapper.Launch --username SSUPII --version 1.12.2-forge1.12.2-14.23.5.2847 --gameDir /media/sergio/SAMSUNG/Games/Technic/technic/modpacks/yaopack --assetsDir /media/sergio/SAMSUNG/Games/Technic/technic/assets --assetIndex 1.12 --uuid fa853c13452d4997aa70f4baf536b695 --accessToken redacted --userType mojang --tweakClass net.minecraftforge.fml.common.launcher.FMLTweaker --versionType Forge --title Yao Pack --icon /media/sergio/SAMSUNG/Games/Technic/technic/assets/packs/yaopack/icon.png
[B#695] java.io.IOException: Cannot run program "/usr/bin/env __VK_LAYER_NV_optimus=NVIDIA_only __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia" (in directory "/media/sergio/SAMSUNG/Games/Technic/technic/modpacks/yaopack"): error=2, File o directory non esistente
[B#695] 	at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
[B#695] 	at net.technicpack.minecraftcore.launch.MinecraftLauncher.launch(MinecraftLauncher.java:97)
[B#695] 	at net.technicpack.launcher.launch.Installer$1.run(Installer.java:174)
[B#695] 	at java.lang.Thread.run(Thread.java:748)
[B#695] Caused by: java.io.IOException: error=2, File o directory non esistente
[B#695] 	at java.lang.UNIXProcess.forkAndExec(Native Method)
[B#695] 	at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
[B#695] 	at java.lang.ProcessImpl.start(ProcessImpl.java:134)
[B#695] 	at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
[B#695] 	... 3 more

Technic Launcher can't find `env` when used as wrapper command. `env` is needed to setup environment variables in Linux systems. `env` is available in the system and can be called by any other program. Both `env` and `/usr/bin/env` (where env is located) seem unavailable when used as wrapper command. In this case the flags are 

__VK_LAYER_NV_optimus=NVIDIA_only __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia

to enable discrete card offloading for Nvidia Optimus laptops.

Launcher console detections 

[B#695] OS: linux
[B#695] Identified as linux
[B#695] Java: 1.8.0_302 64-bit (amd64)

`neofetch` output 

sergio@debian:~$ neofetch
       _,met$$$$$gg.          sergio@debian 
    ,g$$$$$$$$$$$$$$$P.       ------------- 
  ,g$$P"     """Y$$.".        OS: Debian GNU/Linux bookworm/sid x86_64 
 ,$$P'              `$$$.     Host: VivoBook_ASUSLaptop X580GD_N580GD 1.0 
',$$P       ,ggs.     `$$b:   Kernel: 5.10.0-8-amd64 
`d$$'     ,$P"'   .    $$$    Uptime: 56 mins 
 $$P      d$'     ,    $$P    Packages: 4201 (dpkg), 14 (flatpak), 3 (snap) 
 $$:      $$.   -    ,d$$'    Shell: bash 5.1.8 
 $$;      Y$b._   _,d$P'      Resolution: 1920x1080 
 Y$$.    `.`"Y$$$$P"'         DE: Xfce 4.16 
 `$$b      "-.__              WM: Xfwm4 
  `Y$$                        WM Theme: Default-hdpi 
   `Y$$.                      Theme: BlueMenta [GTK2], Breeze [GTK3] 
     `$$b.                    Icons: Papirus-Light [GTK2] 
       `Y$$b.                 Terminal: qterminal 
          `"Y$b._             Terminal Font: Liberation Mono 15 
              `"""            CPU: Intel i7-8750H (12) @ 4.100GHz 
                              GPU: NVIDIA GeForce GTX 1050 Mobile 
                              GPU: Intel CoffeeLake-H GT2 [UHD Graphics 630] 
                              Memory: 3960MiB / 15858MiB


The launcher will boot Minecraft just fine if no flags are trying to be set, but of course in my case means rendering the game with Intel Mesa drivers.

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