=== DEPENDENCIES (1 transitive) ===
  conf-gmp.5                                         7da4ed89a31b
=== STDOUT ===
Processing: [default: loading data]
[conf-gmp-powm-sec.4/test.c: dl]
-> retrieved conf-gmp-powm-sec.4  (https://raw.githubusercontent.com/ocaml/opam-source-archives/main/patches/conf-gmp-powm-sec/test.c.3)
[conf-gmp-powm-sec: sh]
+ /usr/bin/sh "-c" "pkg-config --print-errors --exists gmp || cc -c $CFLAGS -I/usr/local/include test.c" (CWD=/home/opam/.opam/default/.opam-switch/build/conf-gmp-powm-sec.4)
- /usr/bin/sh: 1: pkg-config: not found
-> compiled  conf-gmp-powm-sec.4
-> installed conf-gmp-powm-sec.4

=== STDERR ===