diff --git a/www-apps/nextcloud/files/php-argon2-en.txt b/www-apps/nextcloud/files/php-argon2-en.txt
new file mode 100644
index 0000000000000..44d6487890daf
--- /dev/null
+++ b/www-apps/nextcloud/files/php-argon2-en.txt
@@ -0,0 +1,11 @@
+Migrating from an existing Nextcloud deployment
+
+if you migrate data from a previously existing Nextcloud deployment, you may
+need to enable USE=argon2 on dev-lang/php (if previous system ran on a php
+version using this hashing algorithm)
+
+This is not listed in ebuild requirements as this will not be required for
+most systems (new installs and some migrations)
+
+More details in bug:
+https://bugs.gentoo.org/762388
diff --git a/www-apps/nextcloud/nextcloud-18.0.12.ebuild b/www-apps/nextcloud/nextcloud-18.0.12.ebuild
index de1b7898efdff..0aa3ba1808c60 100644
--- a/www-apps/nextcloud/nextcloud-18.0.12.ebuild
+++ b/www-apps/nextcloud/nextcloud-18.0.12.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -37,5 +37,7 @@ src_install() {
 	webapp_serverowned -R "${MY_HTDOCSDIR}"/config
 	webapp_configfile "${MY_HTDOCSDIR}"/.htaccess
 
+	webapp_postinst_txt en "${FILESDIR}"/php-argon2-en.txt
+
 	webapp_src_install
 }
diff --git a/www-apps/nextcloud/nextcloud-18.0.13.ebuild b/www-apps/nextcloud/nextcloud-18.0.13.ebuild
index f4ace9730f93e..0aa3ba1808c60 100644
--- a/www-apps/nextcloud/nextcloud-18.0.13.ebuild
+++ b/www-apps/nextcloud/nextcloud-18.0.13.ebuild
@@ -37,5 +37,7 @@ src_install() {
 	webapp_serverowned -R "${MY_HTDOCSDIR}"/config
 	webapp_configfile "${MY_HTDOCSDIR}"/.htaccess
 
+	webapp_postinst_txt en "${FILESDIR}"/php-argon2-en.txt
+
 	webapp_src_install
 }
diff --git a/www-apps/nextcloud/nextcloud-19.0.6.ebuild b/www-apps/nextcloud/nextcloud-19.0.6.ebuild
index de1b7898efdff..0aa3ba1808c60 100644
--- a/www-apps/nextcloud/nextcloud-19.0.6.ebuild
+++ b/www-apps/nextcloud/nextcloud-19.0.6.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -37,5 +37,7 @@ src_install() {
 	webapp_serverowned -R "${MY_HTDOCSDIR}"/config
 	webapp_configfile "${MY_HTDOCSDIR}"/.htaccess
 
+	webapp_postinst_txt en "${FILESDIR}"/php-argon2-en.txt
+
 	webapp_src_install
 }
diff --git a/www-apps/nextcloud/nextcloud-19.0.7.ebuild b/www-apps/nextcloud/nextcloud-19.0.7.ebuild
index f4ace9730f93e..0aa3ba1808c60 100644
--- a/www-apps/nextcloud/nextcloud-19.0.7.ebuild
+++ b/www-apps/nextcloud/nextcloud-19.0.7.ebuild
@@ -37,5 +37,7 @@ src_install() {
 	webapp_serverowned -R "${MY_HTDOCSDIR}"/config
 	webapp_configfile "${MY_HTDOCSDIR}"/.htaccess
 
+	webapp_postinst_txt en "${FILESDIR}"/php-argon2-en.txt
+
 	webapp_src_install
 }
diff --git a/www-apps/nextcloud/nextcloud-20.0.4.ebuild b/www-apps/nextcloud/nextcloud-20.0.4.ebuild
index de1b7898efdff..0aa3ba1808c60 100644
--- a/www-apps/nextcloud/nextcloud-20.0.4.ebuild
+++ b/www-apps/nextcloud/nextcloud-20.0.4.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -37,5 +37,7 @@ src_install() {
 	webapp_serverowned -R "${MY_HTDOCSDIR}"/config
 	webapp_configfile "${MY_HTDOCSDIR}"/.htaccess
 
+	webapp_postinst_txt en "${FILESDIR}"/php-argon2-en.txt
+
 	webapp_src_install
 }
diff --git a/www-apps/nextcloud/nextcloud-20.0.5.ebuild b/www-apps/nextcloud/nextcloud-20.0.5.ebuild
index f4ace9730f93e..0aa3ba1808c60 100644
--- a/www-apps/nextcloud/nextcloud-20.0.5.ebuild
+++ b/www-apps/nextcloud/nextcloud-20.0.5.ebuild
@@ -37,5 +37,7 @@ src_install() {
 	webapp_serverowned -R "${MY_HTDOCSDIR}"/config
 	webapp_configfile "${MY_HTDOCSDIR}"/.htaccess
 
+	webapp_postinst_txt en "${FILESDIR}"/php-argon2-en.txt
+
 	webapp_src_install
 }