Tensorflow 1.15 for Raspberry pi build fail
What is difference between TF 2 and 1.15? @NeighborhoodCoding The source code I want to test is written in tensorflow 1.15.
There was many syntactic change in TF2 compared to TF1.15 @KeondoPark,
TensorFlow 1.x is not actively supported. Could you please update TensorFlow to the latest stable version v2.13.0 and check if you are facing the same issue. 
Also in the document which you were referring to where it was mentioned **#r1.9, r1.10** as the example. 
https://github.com/tensorflow/build/tree/master/raspberry_pi_builds#download-the-tensorflow-source-code

`git checkout <branch_name>  # r1.9, r1.10, etc.`

Thank you! @tilakrayal 
Hi, I would like to test another person's code written in tf1.15.
I tried another version as you recommended(1.10, 1.9), but same error occurred. @KeondoPark,
As suggested tensorFlow 1.x is not actively supported. Could you please update TensorFlow to the latest stable version v2.13.0 and check if you are facing the same issue. We are requesting the community to go with the 2.x rather than 1.x where most of the bugs were resolved in latest versions.

https://www.tensorflow.org/guide/migrate
Thank you!

 This issue is stale because it has been open for 7 days with no activity. It will be closed if no further activity occurs. Thank you. This issue was closed because it has been inactive for 7 days since being marked as stale. Please reopen if you'd like to work on this further. Are you satisfied with the resolution of your issue?
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### Issue type

Build/Install

### Have you reproduced the bug with TensorFlow Nightly?

No

### Source

source

### TensorFlow version

tf 1.15

### Custom code

No

### OS platform and distribution

Linux and Ubuntu 18.05

### Mobile device

target platform: Raspberry pi 4

### Python version

3.7

### Bazel version

na

### GCC/compiler version

na

### CUDA/cuDNN version

na

### GPU model and memory

na

### Current behavior?

Hi

I am trying to install tensorflow 1.15 on Raspberry pi and found this page:
https://github.com/tensorflow/build/tree/master/raspberry_pi_builds

From my understanding, I can do this at another platform (GPU server, ubuntu 18.05 installed).
I followed the instruction in the page, but came across the following error message:
From my guess, it looks like pip is not recognized in Docker.
Could you tell me how to resolve this issue??

### Standalone code to reproduce the issue

```shell
# I followed the instruction here: https://github.com/tensorflow/build/tree/master/raspberry_pi_builds
# And use this command to build

tensorflow/tools/ci_build/ci_build.sh PI-PYTHON37 \
    tensorflow/tools/ci_build/pi/build_raspberry_pi.sh
```


### Relevant log output

```shell
CI_DOCKER_BUILD_EXTRA_PARAMS: 
CI_DOCKER_EXTRA_PARAMS: 
COMMAND: tensorflow/tools/ci_build/pi/build_raspberry_pi.sh
CI_COMMAND_PREFIX: ./tensorflow/tools/ci_build/builds/with_the_same_user ./tensorflow/tools/ci_build/builds/configured pi-python37
CONTAINER_TYPE: pi-python37
BUILD_TAG: tf_ci
  (docker container name will be tf_ci.pi-python37)

Building container (tf_ci.pi-python37)...
[+] Building 2.9s (10/17)                                                                                                                         
 => [internal] load build definition from Dockerfile.pi-python37                                                                             0.0s
 => => transferring dockerfile: 866B                                                                                                         0.0s
 => [internal] load .dockerignore                                                                                                            0.0s
 => => transferring context: 2B                                                                                                              0.0s
 => [internal] load metadata for docker.io/library/ubuntu:16.04                                                                              1.4s
 => [internal] load build context                                                                                                            0.0s
 => => transferring context: 22.45kB                                                                                                         0.0s
 => [ 1/13] FROM docker.io/library/ubuntu:16.04@sha256:1f1a2d56de1d604801a9671f301190704c25d604a416f59e03c04f5c6ffee0d6                      0.0s
 => CACHED [ 2/13] COPY install/*.sh /install/                                                                                               0.0s
 => CACHED [ 3/13] RUN /install/install_bootstrap_deb_packages.sh                                                                            0.0s
 => CACHED [ 4/13] RUN add-apt-repository -y ppa:openjdk-r/ppa &&     add-apt-repository -y ppa:george-edison55/cmake-3.x                    0.0s
 => CACHED [ 5/13] RUN /install/install_deb_packages.sh                                                                                      0.0s
 => ERROR [ 6/13] RUN /install/install_pip_packages.sh                                                                                       1.4s
------                                                                                                                                            
 > [ 6/13] RUN /install/install_pip_packages.sh:                                                                                                  
#0 0.789 Searching for pip                                                                                                                        
#0 0.789 Reading https://pypi.python.org/simple/pip/                                                                                              
#0 0.867 Couldn't find index page for 'pip' (maybe misspelled?)                                                                                   
#0 0.867 Scanning index of all packages (this may take a while)                                                                                   
#0 0.867 Reading https://pypi.python.org/simple/
#0 0.936 No local packages or download links found for pip
#0 0.937 error: Could not find suitable distribution for Requirement.parse('pip')
------
Dockerfile.pi-python37:11
--------------------
   9 |         add-apt-repository -y ppa:george-edison55/cmake-3.x
  10 |     RUN /install/install_deb_packages.sh
  11 | >>> RUN /install/install_pip_packages.sh
  12 |     RUN /install/install_bazel.sh
  13 |     RUN /install/install_proto3.sh
--------------------
ERROR: failed to solve: process "/bin/sh -c /install/install_pip_packages.sh" did not complete successfully: exit code: 1
ERROR: docker build failed. Dockerfile is at /home/keondopark/tensorflow/tensorflow/tools/ci_build/Dockerfile.pi-python37
```
