Fix error in `virtualenv_create()` #1261

Job	Run time
OS=macOS-latest R=release py=3.10	3m 38s
OS=windows-latest R=release py=3.10	10m 48s
OS=ubuntu-latest R=release py=3.10	5m 3s
OS=macOS-latest R=oldrel py=3.10	3m 47s
OS=ubuntu-latest R=oldrel-1 py=3.9	4m 20s
OS=ubuntu-latest R=oldrel-2 py=3.9	4m 32s
OS=ubuntu-20.04 R=oldrel-3 py=3.8	4m 39s
OS=ubuntu-20.04 R=oldrel-4 py=3.8	4m 44s
OS=ubuntu-latest R=release py=3.7	5m 35s
OS=ubuntu-latest R=release py=3.8	4m 32s
OS=ubuntu-latest R=release py=3.9	4m 13s
OS=ubuntu-latest R=release py=3.11	4m 55s
OS=ubuntu-latest R=release py=3.12	4m 21s
OS=ubuntu-latest R=devel py=3.12	4m 53s
	1h 10m 0s

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