diff --git a/pkgs/build-support/build-fhs-chrootenv/init.sh.in b/pkgs/build-support/build-fhs-chrootenv/init.sh.in
index 9078a31fe46..9c85069a655 100644
--- a/pkgs/build-support/build-fhs-chrootenv/init.sh.in
+++ b/pkgs/build-support/build-fhs-chrootenv/init.sh.in
@@ -3,7 +3,7 @@
 chrootenvDest=/run/chrootenv/@name@
 
 # Create some mount points for stuff that must be bind mounted
-mkdir -p $chrootenvDest/{nix/store,dev,proc,sys,host-etc,home,var,run}
+mkdir -p $chrootenvDest/{nix/store,dev,proc,sys,host-etc,host-tmp,home,var,run}
 
 # Symlink the software that should be part of the chroot system profile
 for i in @chrootEnv@/*
diff --git a/pkgs/build-support/build-fhs-chrootenv/mount.sh.in b/pkgs/build-support/build-fhs-chrootenv/mount.sh.in
index ef2cac21c21..24b28aae78f 100644
--- a/pkgs/build-support/build-fhs-chrootenv/mount.sh.in
+++ b/pkgs/build-support/build-fhs-chrootenv/mount.sh.in
@@ -22,5 +22,13 @@ mount --rbind /run $chrootenvDest/run
 # Bind mount the host system's /etc
 mount --bind /etc $chrootenvDest/host-etc
 
+# Bind mount the host system's /tmp
+mount --bind /tmp $chrootenvDest/host-tmp
+
 # Bind mount /tmp
 mount --bind /tmp/chrootenv-@name@ $chrootenvDest/tmp
+
+# Expose sockets in /tmp
+for i in /tmp/.*-unix; do
+  ln -s "/host-tmp/$(basename "$i")" "$chrootenvDest/$i"
+done
diff --git a/pkgs/build-support/build-fhs-chrootenv/umount.sh.in b/pkgs/build-support/build-fhs-chrootenv/umount.sh.in
index b8222a4121a..27000cff10a 100644
--- a/pkgs/build-support/build-fhs-chrootenv/umount.sh.in
+++ b/pkgs/build-support/build-fhs-chrootenv/umount.sh.in
@@ -3,4 +3,4 @@
 chrootenvDest=/run/chrootenv/@name@
 
 # Unmount all (r)bind mounts
-umount -l $chrootenvDest/{dev/pts,dev/shm,dev,nix/store,proc,sys,host-etc,home,var,tmp,run}
+umount -l $chrootenvDest/{dev/pts,dev/shm,dev,nix/store,proc,sys,host-etc,host-tmp,home,var,tmp,run}
diff --git a/pkgs/build-support/build-fhs-userenv/chroot-user.rb b/pkgs/build-support/build-fhs-userenv/chroot-user.rb
index c555f053875..c31d0f7a258 100755
--- a/pkgs/build-support/build-fhs-userenv/chroot-user.rb
+++ b/pkgs/build-support/build-fhs-userenv/chroot-user.rb
@@ -7,6 +7,7 @@ mounts = [ ['/nix/store', nil],
            ['/proc', nil],
            ['/sys', nil],
            ['/etc', 'host-etc'],
+           ['/tmp', 'host-tmp'],
            ['/home', nil],
            ['/var', nil],
            ['/run', nil],
diff --git a/pkgs/build-support/build-fhs-userenv/default.nix b/pkgs/build-support/build-fhs-userenv/default.nix
index 546345c7e6c..b5b77f9984a 100644
--- a/pkgs/build-support/build-fhs-userenv/default.nix
+++ b/pkgs/build-support/build-fhs-userenv/default.nix
@@ -10,6 +10,11 @@ let
   '';
 
   init = writeText "init" ''
+           # Expose sockets in /tmp
+           for i in /host-tmp/.*-unix; do
+             ln -s "$i" "/tmp/$(basename "$i")"
+           done
+
            [ -d "$1" ] && [ -r "$1" ] && cd "$1"
            shift
            exec "${runScript}" "$@"