* installing *source* package ‘openmpt’ ...
** using staged installation
Package libopenmpt was not found in the pkg-config search path.
Perhaps you should add the directory containing `libopenmpt.pc'
to the PKG_CONFIG_PATH environment variable
Package 'libopenmpt', required by 'virtual:world', not found
Using PKG_CFLAGS=
Using PKG_LIBS=-llibportaudio -llibportaudiocpp -llibopenmpt
--------------------------- [ANTICONF] --------------------------------
Configuration failed because libopenmpt portaudio-2.0 portaudiocpp was not found. Try installing:
 * deb: libopenmpt-dev portaudio-dev (Debian, Ubuntu, etc)
 * rpm: libopenmpt-devel portaudio-devel (Fedora, EPEL)
If libopenmpt portaudio-2.0 portaudiocpp is already installed, check that 'pkg-config' is in your
PATH and PKG_CONFIG_PATH contains a libopenmpt portaudio-2.0 portaudiocpp.pc file. If pkg-config
is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:
R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...'
-------------------------- [ERROR MESSAGE] ---------------------------
<stdin>:1:10: fatal error: 'libopenmpt/libopenmpt.h' file not found
    1 | #include <libopenmpt/libopenmpt.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
--------------------------------------------------------------------
ERROR: configuration failed for package ‘openmpt’
* removing ‘/srv/hornik/tmp/CRAN_pretest/openmpt.Rcheck/openmpt’