pacman-case-insensitive

install.log

$ pacman -U example2-1.0-1-any.pkg.tar.xz
loading packages...
resolving dependencies...
looking for conflicting packages...

Packages (1) example2-1.0-1

Total Installed Size:  0.00 MiB

:: Proceed with installation? [Y/n]
(1/1) checking keys in keyring                     [######################] 100%
(1/1) checking package integrity                   [######################] 100%
(1/1) loading package files                        [######################] 100%
(1/1) checking for file conflicts                  [######################] 100%
(1/1) checking available disk space                [######################] 100%
(1/1) installing example2                          [######################] 100%

$ pacman -U example2-2.0-1-any.pkg.tar.xz
loading packages...
resolving dependencies...
looking for conflicting packages...

Packages (1) example2-2.0-1

Total Installed Size:  0.00 MiB
Net Upgrade Size:      0.00 MiB

:: Proceed with installation? [Y/n]
(1/1) checking keys in keyring                     [######################] 100%
(1/1) checking package integrity                   [######################] 100%
(1/1) loading package files                        [######################] 100%
(1/1) checking for file conflicts                  [######################] 100%
error: failed to commit transaction (conflicting files)
example2: /var/example2 exists in filesystem
Errors occurred, no packages were upgraded.

PKGBUILD.1

pkgname=example2
pkgver=1.0
pkgrel=1
arch=('any')

package() {
  mkdir "${pkgdir}/var"
  echo "example2" > "${pkgdir}/var/EXAMPLE2"
}

PKGBUILD.2

pkgname=example2
pkgver=2.0
pkgrel=1
arch=('any')

package() {
  mkdir "${pkgdir}/var"
  echo "example2" > "${pkgdir}/var/example2"
}