Check therepoclub for download

pacman -Si therepoclub/themix-theme-materia-git

Repository      : therepoclub
Name            : themix-theme-materia-git
Version         : 20210322.r49.g76cac96c-1
Description     : Materia theme plugin (GTK2, GTK3, GTK4, Cinnamon, GNOME, Metacity, Unity, Xfwm) for Themix GUI designer. Have a hack for HiDPI in GTK2.
Architecture    : x86_64
URL             :
Licenses        : GPL3
Groups          : None
Provides        : themix-theme-materia
Depends On      : gtk3  glib2  gdk-pixbuf2  gtk-engine-murrine  gtk-engines  gnome-themes-extra  sassc  sed  findutils  grep  parallel  meson  optipng  inkscape
Optional Deps   : themix-gui: GUI
Conflicts With  : themix-theme-materia  oomox  oomox-git
Replaces        : None
Download Size   : 595.01 KiB
Installed Size  : 1610.48 KiB
Packager        : Wayne Wesley 
Build Date      : Sun 17 Oct 2021 15:13:15 BST
Validated By    : MD5 Sum  SHA-256 Sum  Signature

How to install from therepoclub

pacman -S therepoclub/themix-theme-materia-git