see https://gitlab.alpinelinux.org/alpine/aports/-/issues/14844
--
diff --git a/profile/flatpak.fish b/profile/flatpak.fish
index 117f0a4..630210a 100644
--- a/profile/flatpak.fish
+++ b/profile/flatpak.fish
@@ -3,6 +3,19 @@ if type -q flatpak
 
     set -x --path XDG_DATA_DIRS $XDG_DATA_DIRS
 
+    # set TZDIR to our setup-timezone directory
+    # see https://gitlab.alpinelinux.org/alpine/aports/-/issues/14844
+    if test -d /etc/zoneinfo
+        # this directory only exists if setup-timezone was run to add one timezone and not add tzdata.
+        # unconditionally setting it would break things when it does not exist, so make sure it does.
+        # if it does not exist, then /etc/localtime is going to be pointing to /usr/share/zoneinfo.
+        set -l contents (command ls -A /etc/zoneinfo)
+        # it can also be empty. don't export it then
+        if test -n "$contents"
+            set -x TZDIR /etc/zoneinfo
+        end
+    end
+
     set -q XDG_DATA_DIRS[1]; or set XDG_DATA_DIRS /usr/local/share /usr/share
     set -q XDG_DATA_HOME; or set -l XDG_DATA_HOME $HOME/.local/share
 
diff --git a/profile/flatpak.sh b/profile/flatpak.sh
index 9dc6cf9..1feaddd 100644
--- a/profile/flatpak.sh
+++ b/profile/flatpak.sh
@@ -23,4 +23,18 @@ if command -v flatpak > /dev/null; then
 
     export XDG_DATA_DIRS
     XDG_DATA_DIRS="${new_dirs:+${new_dirs}:}${XDG_DATA_DIRS:-/usr/local/share:/usr/share}"
+
+    # set TZDIR to our setup-timezone directory
+    # see https://gitlab.alpinelinux.org/alpine/aports/-/issues/14844
+    if [ -d /etc/zoneinfo ]; then
+        # this directory only exists if setup-timezone was run to add one timezone and not add tzdata.
+        # unconditionally setting it would break things when it does not exist, so make sure it does.
+        # if it does not exist, then /etc/localtime is going to be pointing to /usr/share/zoneinfo.
+        contents="$(command ls -A /etc/zoneinfo)"
+        # it can also be empty. don't export it then
+        if [ -n "$contents" ]; then
+            export TZDIR=/etc/zoneinfo
+        fi
+        unset contents
+    fi
 fi