How to install pip?

[SporadicThought]

$ SODIUM_INSTALL=system pip2 install pynacl No command pip2 found, did you mean:
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$ set
ANDROID_DATA=/data
ANDROID_ROOT=/system
BASH=/data/data/com.termux/files/usr/bin/bash
BASHOPTS=checkwinsize:cmdhist:complete_fullquote:expand_aliases:extquote:force_fignore:globasciiranges:hostcomplete:interactive_comments:login_shell:progcomp:promptvars:sourcepath
BASH_ALIASES=()
BASH_ARGC=([0]="0")
BASH_ARGV=()
BASH_CMDS=()
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="5" [1]="0" [2]="17" [3]="1" [4]="release" [5]="arm-unknown-linux-androideabi")
BASH_VERSION='5.0.17(1)-release'
BOOTCLASSPATH=/system/framework/qcom.fmradio.jar:/system/framework/QPerformance.jar:/system/framework/UxPerformance.jar:/system/framework/tcmiface.jar:/system/framework/telephony-ext.jar:/system/framework/core-oj.jar:/system/framework/core-libart.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/bouncycastle.jar:/system/framework/apache-xml.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/ims-common.jar:/system/framework/android.hidl.base-V1.0-java.jar:/system/framework/android.hidl.manager-V1.0-java.jar:/system/framework/framework-oahl-backward-compatibility.jar:/system/framework/android.test.base.jar
COLUMNS=48
DIRSTACK=()
EUID=10175
EXTERNAL_STORAGE=/sdcard
GROUPS=()
HISTFILE=/data/data/com.termux/files/home/.bash_history
HISTFILESIZE=500
HISTSIZE=500
HOME=/data/data/com.termux/files/home
HOSTNAME=localhost
HOSTTYPE=arm
IFS=$' \t\n'
LANG=en_US.UTF-8
LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermux-exec.so
LINES=23
MACHTYPE=arm-unknown-linux-androideabi
MAILCHECK=60
OPTERR=1
OPTIND=1
OSTYPE=linux-androideabi
PATH=/data/data/com.termux/files/usr/bin:/data/data/com.termux/files/usr/bin/applets
PIPESTATUS=([0]="127")
PPID=20896
PREFIX=/data/data/com.termux/files/usr
PS1='$ '
PS2='> '
PS4='+ '
PWD=/data/data/com.termux/files/home
SHELL=/data/data/com.termux/files/usr/bin/bash
SHELLOPTS=braceexpand:emacs:hashall:histexpand:history:interactive-comments:monitor
SHLVL=1
TERM=xterm-256color
TMPDIR=/data/data/com.termux/files/usr/tmp
UID=10175
_=pynacl
command_not_found_handle ()
{
/data/data/com.termux/files/usr/libexec/termux/command-not-found "$1"
}
gawklibpath_append ()
{
[ -z "$AWKLIBPATH" ] && AWKLIBPATH=gawk 'BEGIN {print ENVIRON["AWKLIBPATH"]}';
export AWKLIBPATH="$AWKLIBPATH:$"
}
gawklibpath_default ()
{
unset AWKLIBPATH;
export AWKLIBPATH=gawk 'BEGIN {print ENVIRON["AWKLIBPATH"]}'
}
gawklibpath_prepend ()
{
[ -z "$AWKLIBPATH" ] && AWKLIBPATH=gawk 'BEGIN {print ENVIRON["AWKLIBPATH"]}';
export AWKLIBPATH="$:$AWKLIBPATH"
}
gawkpath_append ()
{
[ -z "$AWKPATH" ] && AWKPATH=gawk 'BEGIN {print ENVIRON["AWKPATH"]}';
export AWKPATH="$AWKPATH:$"
}
gawkpath_default ()
{
unset AWKPATH;
export AWKPATH=gawk 'BEGIN {print ENVIRON["AWKPATH"]}'
}
gawkpath_prepend ()
{
[ -z "$AWKPATH" ] && AWKPATH=gawk 'BEGIN {print ENVIRON["AWKPATH"]}';
export AWKPATH="$:$AWKPATH"
}

vs

$ SODIUM_INSTALL='system pip2 install pynacl'
$ set
ANDROID_DATA=/data
ANDROID_ROOT=/system
BASH=/data/data/com.termux/files/usr/bin/bash
BASHOPTS=checkwinsize:cmdhist:complete_fullquote:expand_aliases:extquote:force_fignore:globasciiranges:hostcomplete:interactive_comments:login_shell:progcomp:promptvars:sourcepath
BASH_ALIASES=()
BASH_ARGC=([0]="0")
BASH_ARGV=()
BASH_CMDS=()
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="5" [1]="0" [2]="17" [3]="1" [4]="release" [5]="arm-unknown-linux-androideabi")
BASH_VERSION='5.0.17(1)-release'
BOOTCLASSPATH=/system/framework/qcom.fmradio.jar:/system/framework/QPerformance.jar:/system/framework/UxPerformance.jar:/system/framework/tcmiface.jar:/system/framework/telephony-ext.jar:/system/framework/core-oj.jar:/system/framework/core-libart.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/bouncycastle.jar:/system/framework/apache-xml.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/ims-common.jar:/system/framework/android.hidl.base-V1.0-java.jar:/system/framework/android.hidl.manager-V1.0-java.jar:/system/framework/framework-oahl-backward-compatibility.jar:/system/framework/android.test.base.jar
COLUMNS=48
DIRSTACK=()
EUID=10175
EXTERNAL_STORAGE=/sdcard
GROUPS=()
HISTFILE=/data/data/com.termux/files/home/.bash_history
HISTFILESIZE=500
HISTSIZE=500
HOME=/data/data/com.termux/files/home
HOSTNAME=localhost
HOSTTYPE=arm
IFS=$' \t\n'
LANG=en_US.UTF-8
LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermux-exec.so
LINES=23
MACHTYPE=arm-unknown-linux-androideabi
MAILCHECK=60
OPTERR=1
OPTIND=1
OSTYPE=linux-androideabi
PATH=/data/data/com.termux/files/usr/bin:/data/data/com.termux/files/usr/bin/applets
PIPESTATUS=([0]="0")
PPID=20896
PREFIX=/data/data/com.termux/files/usr
PS1='$ '
PS2='> '
PS4='+ '
PWD=/data/data/com.termux/files/home
SHELL=/data/data/com.termux/files/usr/bin/bash
SHELLOPTS=braceexpand:emacs:hashall:histexpand:history:interactive-comments:monitor
SHLVL=1
SODIUM_INSTALL='system pip2 install pynacl'
TERM=xterm-256color
TMPDIR=/data/data/com.termux/files/usr/tmp
UID=10175