diff --git a/Dockerfile b/Dockerfile
index df8cd7a..ccab095 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,11 +27,13 @@ RUN groupadd opengnsys
 RUN mkdir -p /opt/opengnsys/client /tmp/opengnsys/oglive_builder /var/lib/tftpboot/
 RUN ln -fs /var/lib/tftpboot /opt/opengnsys
 
-## take client stuff from the OG repo
-RUN git clone -c http.sslVerify=false --branch ${OPENGNSYS_BRANCH} https://ognproject.evlt.uma.es/gitea/opengnsys/opengnsys.git /tmp/ogrepo
-RUN rsync -aH /tmp/ogrepo/client/engine /tmp/ogrepo/client/shared /tmp/opengnsys/
+## take stuff from the OG repo: a) cloning engine, b) shared stuff and c) gitrelease
+RUN git clone -c http.sslVerify=false --branch ${OPENGNSYS_BRANCH} https://ognproject.evlt.uma.es/gitea/opengnsys/opengnsys.git /tmp/ogrepo && \
+    mv /tmp/ogrepo/client/engine /tmp/ogrepo/client/shared /tmp/opengnsys/ && \
+    git --git-dir /tmp/ogrepo/.git log --date format:r%Y%m%d --format=%ad -1 >/tmp/opengnsys/oglive_builder/gitrelease && \
+    rm -rf /tmp/ogrepo/
 
-RUN echo foo4
+RUN echo foo2     ## development: invalidate docker cache at this point, so that the 'COPY' below actually copies files
 COPY . /tmp/opengnsys/oglive_builder/
 RUN cp /tmp/opengnsys/oglive_builder/schroot.conf /tmp/opengnsys/oglive_builder/mount-defaults /etc/schroot/ && echo '' >/etc/schroot/default/nssdatabases && rm -f /etc/schroot/setup.d/*chrootname
 
diff --git a/boottools/btog.py b/boottools/btog.py
index 64350dc..5e2218b 100644
--- a/boottools/btog.py
+++ b/boottools/btog.py
@@ -131,11 +131,10 @@ def GetOsInfo1 (type_client):
             oshttp=None
     return osdistrib, oscodename, osrelease, osarch, oshttp
 
-def GetOsInfo2 (ogrepo_dir, versionboottools, oscodename, osrelease, osarch):
-    gitrelease, _  = utils.run (['git', '--git-dir', f'{ogrepo_dir}/.git', 'log', '--date', 'format:r%Y%m%d', '--format=%ad', '-1'])
+def GetOsInfo2 (versionboottools, oscodename, osrelease, osarch, gitrelease):
     nameisoclient  ='-'.join ([versionboottools, oscodename, osrelease, osarch, gitrelease])
     namehostclient = '-'.join ([versionboottools, oscodename, gitrelease])
-    return gitrelease, nameisoclient, namehostclient
+    return nameisoclient, namehostclient
 
 def mkrootfs (btrootfsimg, btrootfsimglabel, btrootfsmnt, btvirtualdisksize, bttargetdir, osarch):
     logger.info (f'Creación y formateo del disco virtual "{btrootfsimg}" "{btvirtualdisksize}" MB')
diff --git a/mkoglive.py b/mkoglive.py
index 12b5704..58e24ad 100755
--- a/mkoglive.py
+++ b/mkoglive.py
@@ -142,14 +142,17 @@ except: pass
 logger.info ('OpenGnsys CLIENT installation begins')
 
 logger.info ('STAGE 1 - clone opengnsys repo')
-ogrepo_dir = '/tmp/ogrepo'      ## per the Dockerfile
+
+fd = open (f'{curdir}/gitrelease', 'r')     ## per the Dockerfile
+gitrelease = fd.readline().strip()
+fd.close()
 
 osdistrib, oscodename, osrelease, osarch, oshttp = btog.GetOsInfo1 (type_client)
 if osdistrib is None:
     logger.error ('GetOsInfo1() failed')
     sys.exit (1)
 btdir, bttargetdir, btrootfsimg, btrootfsmnt, btrootfsimglabel, log_file, versionboottools, btvirtualdisksize = btog.GetVar (osarch)
-gitrelease, nameisoclient, namehostclient = btog.GetOsInfo2 (ogrepo_dir, versionboottools, oscodename, osrelease, osarch)
+nameisoclient, namehostclient = btog.GetOsInfo2 (versionboottools, oscodename, osrelease, osarch, gitrelease)
 logger.info (':'.join ([osdistrib, oscodename, osrelease, osarch, oshttp]))
 
 logger.info ('STAGE 2 - install software in the VM')