Fix Nix pkg-config support #1321

Job	Run time
Documentation	1m 2s
Analyze	3m 13s
Windows VS2019 x86 Shared Debug	3m 28s
Formatting	5s
Windows VS2019 x86 Shared Release	3m 19s
Windows VS2019 x86 Static Debug	3m 48s
Windows VS2019 x86 Static Release	4m 16s
Windows VS2019 x64 Shared Debug	3m 56s
Windows VS2019 x64 Shared Release	3m 38s
Windows VS2019 x64 Static Debug	4m 21s
Windows VS2019 x64 Static Release	4m 5s
Windows VS2022 x86 Shared Debug	4m 1s
Windows VS2022 x86 Shared Release	4m 15s
Windows VS2022 x86 Static Debug	4m 3s
Windows VS2022 x86 Static Release	3m 59s
Windows VS2022 x64 Shared Debug	4m 15s
Windows VS2022 x64 Shared Release	4m 11s
Windows VS2022 x64 Static Debug	4m 20s
Windows VS2022 x64 Static Release	4m 18s
Windows ClangCL Shared Debug	5m 17s
Windows ClangCL Shared Release	4m 31s
Windows ClangCL Static Debug	5m 9s
Windows ClangCL Static Release	5m 47s
Windows Clang Shared Debug	2m 15s
Windows Clang Shared Release	3m 5s
Windows Clang Static Debug	2m 18s
Windows Clang Static Release	2m 25s
Linux GCC Shared Debug	1m 11s
Linux GCC Shared Release	1m 27s
Linux GCC Static Debug	1m 34s
Linux GCC Static Release	1m 21s
Linux Clang Shared Debug	1m 39s
Linux Clang Shared Release	1m 57s
Linux Clang Static Debug	1m 21s
Linux Clang Static Release	1m 32s
MacOS Shared Debug	1m 20s
MacOS Shared Release	1m 6s
MacOS Static Debug	1m 14s
MacOS Static Release	1m 22s
	1h 56m 24s

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