Fix dpdk support when using custom prefix #874

Job	Run time
Test with C++20 modules enabled / test	11m 23s
Test with DPDK enabled / test	11m 58s
Test (clang++, C++20, dev) / test	4m 26s
Test (clang++, C++20, debug) / test	7m 6s
Test (clang++, C++20, release) / test	4m 52s
Test (clang++, C++23, debug) / test	7m 32s
Test (clang++, C++23, dev) / test	4m 26s
Test (clang++, C++23, release) / test	15m 29s
Test (g++, C++20, debug) / test	10m 43s
Test (g++, C++20, dev) / test	4m 28s
Test (g++, C++20, release) / test	8m 15s
Test (g++, C++23, debug) / test	9m 55s
Test (g++, C++23, dev) / test	4m 54s
Test (g++, C++23, release) / test	7m 42s
	1h 53m 9s

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