Error during dpkg upgrade from beta1 to beta3
When upgrading from chronograf beta1 (using a nightly from 18Nov16)to beta3 using command:
```
sudo dpkg -i chronograf_1.1.0~beta3_i386.deb
```
the following ERROR occured:
```
dpkg: warning: downgrading chronograf from 1.2.0~n201611180837-0 to 1.1.0~beta3-1
(Reading database ... 76342 files and directories currently installed.)
Preparing to unpack chronograf_1.1.0~beta3_i386.deb ...
Unpacking chronograf (1.1.0~beta3-1) over (1.2.0~n201611180837-0) ...
Setting up chronograf (1.1.0~beta3-1) ...
Failed to execute operation: Too many levels of symbolic links
```
When I run the version command:
```
chronograf -v
````
I get a return of:
```
2016/12/19 15:09:10 Chronograf 1.1.0~beta3 (git: d840f808afaba8b9421acb317955b9f70a049846)
```
The upgrade script seems to have restarted Chronograf correctly and seems to be working correctly (once I reloaded the browser).
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f37e43ff..4b9898be5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ### Upcoming Bug Fixes
   1. [#755](https://github.com/influxdata/chronograf/pull/755): Fix kapacitor basic auth proxying
+  2. [#704](https://github.com/influxdata/chronograf/issue/704): Fix RPM install script and systemd unit file
 
 ### Upcoming Features
   1. [#660](https://github.com/influxdata/chronograf/issues/660): Add option to accept any certificate from InfluxDB.
diff --git a/etc/build.py b/etc/build.py
index 2db007cb5..466bcb74c 100755
--- a/etc/build.py
+++ b/etc/build.py
@@ -647,7 +647,7 @@ def package(build_output, pkg_name, version, nightly=False, iteration=1, static=
                             package_build_root,
                             current_location)
                         if package_type == "rpm":
-                            fpm_command += "--depends coreutils --rpm-posttrans {} ".format(POSTINST_SCRIPT)
+                            fpm_command += "--depends coreutils"
                         # TODO: Check for changelog
                         # elif package_type == "deb":
                         #     fpm_command += "--deb-changelog {} ".format(os.path.join(os.getcwd(), "CHANGELOG.md"))
diff --git a/etc/scripts/chronograf.service b/etc/scripts/chronograf.service
index 55a82e921..422f6cd92 100644
--- a/etc/scripts/chronograf.service
+++ b/etc/scripts/chronograf.service
@@ -14,4 +14,3 @@ Restart=on-failure
 
 [Install]
 WantedBy=multi-user.target
-Alias=chronograf.service
diff --git a/etc/scripts/post-install.sh b/etc/scripts/post-install.sh
index 420b8f1de..0d570c53b 100644
--- a/etc/scripts/post-install.sh
+++ b/etc/scripts/post-install.sh
@@ -12,6 +12,9 @@ function install_init {
 }
 
 function install_systemd {
+    # Remove any existing symlinks
+    rm -f /etc/systemd/system/chronograf.service
+
     cp -f $SCRIPT_DIR/chronograf.service /lib/systemd/system/chronograf.service
     systemctl enable chronograf || true
     systemctl daemon-reload || true
['etc/build.py', 'etc/scripts/chronograf.service', 'etc/scripts/post-install.sh', 'CHANGELOG.md']