tomholford · September 7, 2025 13:07 · Jan 25, 2021 · Jan 25, 2021 · Jan 25, 2021
diff --git a/install_pg_gem.md b/install_pg_gem.md
@@ -15,7 +15,7 @@ checking for libpq-fe.h... no
 Can't find the 'libpq-fe.h header
 ```
 
-The following helped me resolve the issue without having to install the entire postgresql as recommended in the stop Stack Overflow post (already using it in a Docker container):
+The following helped me resolve the issue without having to install the entire postgresql as recommended in [the stop Stack Overflow post](https://stackoverflow.com/a/6040822) (already using it in a Docker container):
 
 1. `brew install libpq`
 2. `gem install pg -- --with-pg-config=/usr/local/opt/libpq/bin/pg_config`

diff --git a/gistfile0.txt → install_pg_gem.md b/gistfile0.txt → install_pg_gem.md
diff --git a/gistfile0.txt b/gistfile0.txt
@@ -0,0 +1,22 @@
+# Installing `pg` gem on macOS
+
+If you're trying to install the postgresql gem `pg` and it is failing with the following error message:
+
+```
+Installing pg 1.2.3 with native extensions
+Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
+
+    current directory: ~/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/pg-1.2.3/ext
+~/.rbenv/versions/3.0.0/bin/ruby -I ~/.rbenv/versions/3.0.0/lib/ruby/3.0.0 -r ./siteconf20210125-97201-pycpo.rb extconf.rb
+checking for pg_config... no
+No pg_config... trying anyway. If building fails, please try again with
+ --with-pg-config=/path/to/pg_config
+checking for libpq-fe.h... no
+Can't find the 'libpq-fe.h header
+```
+
+The following helped me resolve the issue without having to install the entire postgresql as recommended in the stop Stack Overflow post (already using it in a Docker container):
+
+1. `brew install libpq`
+2. `gem install pg -- --with-pg-config=/usr/local/opt/libpq/bin/pg_config`
+