trying to add a property string that would look like

-newermt '10 minutes ago'

and I get:
[EnvInject] - Injecting environment variables from a build step.
[EnvInject] - Injecting as environment variables the properties content
STOP_ANNOYANCES=--no-2sp_soft_tabs-check --no-arrow_alignment-check
FIND_PARAMS=-newermt \u0027 10 minutes ago \u0027
COMMON_MODULES_TO_CHECK=cpan firewall java jenkins logrotate memcached rpmbuild_setup spi_* tarutils

[EnvInject] - Variables injected successfully.
[EnvInject] - Unset unresolved 'module' variable.
[workspace] $ /bin/sh -xe /tmp/hudson6773043052950121445.sh
++ find cpan firewall java jenkins logrotate memcached rpmbuild_setup spi_aws spi_ganglia spi_mysql spi_nrpe spi_puppet_setup spi_scripts spi_sudoers spi_unified_provisioner spi_users spi_vertical_homedir tarutils -newermt '\u0027' 10 minutes ago '\u0027' -iname '*.pp'
find: I cannot figure out how to interpret `
u0027' as a date or time

I have tried all combinations of escaping that I can think of, and I still cannot seem to get an apostrophe to be put where I want it.