Try changing the cwd for libvirt to pick bios

snap-wrappers/libvirtd/launch-libvirtd

@@ -0,0 +1,6 @@
+#!/bin/sh -e
+
+# Workaround to ensure BIOS can be loaded
+cd $SNAP/qemu
+
+exec "$SNAP/sbin/libvirtd"

snapcraft.yaml

@@ -215,10 +215,17 @@ apps:
 
   # Libvirt/Qemu
   libvirt-bin:
-    command: sbin/libvirtd
+    command: launch-libvirtd
     daemon: simple
+    environment:
+      LD_LIBRARY_PATH: $SNAP/lib:$SNAP/lib/$SNAPCRAFT_ARCH_TRIPLET:$SNAP/usr/lib:$SNAP/usr/lib/$SNAPCRAFT_ARCH_TRIPLET
+      PATH: $SNAP/usr/sbin:$SNAP/usr/bin:$SNAP/sbin:$SNAP/bin:$PATH
+      LC_ALL: C
   virsh:
     command: virsh
+    environment:
+      PATH: $SNAP/usr/sbin:$SNAP/usr/bin:$SNAP/sbin:$SNAP/bin:$PATH
+      LC_ALL: C
 
   # MySQL
   # MySQL
@@ -605,6 +612,14 @@ parts:
       # * is not used to avoid directory merge conflicts
       snap/microstack/current/: ./
 
+  libvirtd-wrapper:
+    source: ./snap-wrappers/libvirtd
+    plugin: dump
+    after:
+      - libvirt
+    organize:
+      launch-libvirtd: bin/launch-libvirtd
+
   # MySQL
   mysql-server:
     plugin: dump