jpm build fails when using system SQLite library

I wanted to build the version with my system's SQLite library.
As far as I have debugged, the compilation steps do not create the output object files in the *build/* directory.
If I run each `cc` command by hand, I will succeed.
But I have no idea and experiences with `jpm` why it did not create the intermediate object files.
Other `jpm build` steps with other packages work fine though.

Here is my issue in detail:
```
$ jpm --verbose build
cc -c main.c -DUSE_SYSTEM_SQLITE -DJANET_BUILD_TYPE=release -I/usr/include/janet -I/usr/lib/janet -O2 -fPIC -o build/main.o
generating meta file build/sqlite3.meta.janet...
cc: warning: : linker input file unused because linking not done
cc: error: : linker input file not found: No such file or directory
error: error: command failed with non-zero exit code 1
in os/execute [src/core/os.c] on line 1362
in shell [/usr/lib/janet/jpm/shutil.janet] (tailcall) on line 143, column 5
in [/usr/lib/janet/jpm/rules.janet] on line 20, column 22
error: build fail
in pdag [/usr/lib/janet/jpm/dagbuild.janet] (tailcall) on line 79, column 23
in run [/usr/lib/janet/jpm/cli.janet] (tailcall) on line 88, column 9
in run-main [boot.janet] on line 3951, column 16
in cli-main [boot.janet] on line 4104, column 17
$ # build/main.o is missing, it was not created!
$ ls build
sqlite3.meta.janet
$ # but running above compilation by hand works just fine:
$ cc -c main.c -DUSE_SYSTEM_SQLITE -DJANET_BUILD_TYPE=release -I/usr/include/janet -I/usr/lib/janet -O2 -fPIC -o build/main.o
$ ls build
main.o sqlite3.meta.janet
$ # now I could continue, every `cc` command only outputs its targets when run manually…
```

Start with main.c and the verbose jpm build output, reproducing the build with USE_SYSTEM_SQLITE. Compare the failing jpm invocation with the manual cc command and inspect why build/main.o is not created. Done means jpm build completes and generates the expected object files without manual commands.

Written by the indexing model from the issue text.