steamtinkerlaunch (master =)$ rm -rf /tmp/test; mkdir /tmp/test

steamtinkerlaunch (master =)$ PREFIX=/tmp/test make install
sed "s:^PREFIX=\"/usr\":PREFIX=\"/tmp/test\":" -i steamtinkerlaunch
install -Dm755 steamtinkerlaunch -t "/tmp/test/bin"
install -d "/tmp/test/share/steamtinkerlaunch"
cp -r collections eval guicfgs lang misc "/tmp/test/share/steamtinkerlaunch"
install -Dm644 README.md -t "/tmp/test/share/doc/steamtinkerlaunch"
install -Dm644 "misc/steamtinkerlaunch.desktop" -t "/tmp/test/share/applications"
install -Dm644 "misc/steamtinkerlaunch.svg" -t "/tmp/test/share/icons/hicolor/scalable/apps"

steamtinkerlaunch (master =)$ find /tmp/test -type f | wc -l
181

steamtinkerlaunch (master =)$ PREFIX=/tmp/test make uninstall
rm -rf "/tmp/test/share/icons/hicolor/scalable/apps/misc/steamtinkerlaunch.svg"
rm -rf "/tmp/test/share/applications/misc/steamtinkerlaunch.desktop"
rm -rf "/tmp/test/share/doc/steamtinkerlaunch"
rm -rf "/tmp/test/share/steamtinkerlaunch"
rm -f "/tmp/test/bin/steamtinkerlaunch"

steamtinkerlaunch (master =)$ find /tmp/test -type f | wc -l
2

steamtinkerlaunch (master =)$ find /tmp/test -type f
/tmp/test/share/applications/steamtinkerlaunch.desktop
/tmp/test/share/icons/hicolor/scalable/apps/steamtinkerlaunch.svg

steamtinkerlaunch (fix-make-uninstall)$ rm -rf /tmp/test; mkdir /tmp/test

steamtinkerlaunch (fix-make-uninstall)$ PREFIX=/tmp/test make install
sed "s:^PREFIX=\"/usr\":PREFIX=\"/tmp/test\":" -i steamtinkerlaunch
install -Dm755 steamtinkerlaunch -t "/tmp/test/bin"
install -d "/tmp/test/share/steamtinkerlaunch"
cp -r collections eval guicfgs lang misc "/tmp/test/share/steamtinkerlaunch"
install -Dm644 README.md -t "/tmp/test/share/doc/steamtinkerlaunch"
install -Dm644 "misc/steamtinkerlaunch.desktop" -t "/tmp/test/share/applications"
install -Dm644 "misc/steamtinkerlaunch.svg" -t "/tmp/test/share/icons/hicolor/scalable/apps"

steamtinkerlaunch (fix-make-uninstall)$ find /tmp/test -type f | wc -l
181

steamtinkerlaunch (fix-make-uninstall)$ PREFIX=/tmp/test make uninstall
rm -f "/tmp/test/share/icons/hicolor/scalable/apps/steamtinkerlaunch.svg"
rm -f "/tmp/test/share/applications/steamtinkerlaunch.desktop"
rm -rf "/tmp/test/share/doc/steamtinkerlaunch"
rm -rf "/tmp/test/share/steamtinkerlaunch"
rm -f "/tmp/test/bin/steamtinkerlaunch"

steamtinkerlaunch (fix-make-uninstall)$ find /tmp/test -type f | wc -l
0