diff --git a/.ci/pipeline/ci.yml b/.ci/pipeline/ci.yml
index fc63e1f9fed..0b6e34df6f3 100755
--- a/.ci/pipeline/ci.yml
+++ b/.ci/pipeline/ci.yml
@@ -45,6 +45,7 @@ jobs:
     vmImage: '$(VM_IMAGE)'
   steps:
     - script: |
+        echo $(Build.SourceBranch)
         .ci/env/apt.sh clang-format
         .ci/env/editorconfig-checker.sh
       displayName: 'Install Dependencies'
diff --git a/INSTALL.md b/INSTALL.md
index 2328024d771..7ac302aea07 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -21,7 +21,7 @@ Required Software:
 * C/C++ Compiler
 * [DPC++ Compiler](https://www.intel.com/content/www/us/en/developer/tools/oneapi/dpc-compiler.html) and [oneMKL](https://www.intel.com/content/www/us/en/developer/tools/oneapi/onemkl.html) if building with SYCL support
 * BLAS and LAPACK libraries - both provided by oneMKL
-* Python version 3.9 or higher
+* Python version 2.7 or higher
 * TBB library (repository contains script to download it)
 * Microsoft Visual Studio\* (Windows\* only)
 * [MSYS2](http://msys2.github.io) (Windows\* only)
diff --git a/deploy/pkg-config/generate_pkgconfig.py b/deploy/pkg-config/generate_pkgconfig.py
index 323ff7e5138..78c3941138e 100755
--- a/deploy/pkg-config/generate_pkgconfig.py
+++ b/deploy/pkg-config/generate_pkgconfig.py
@@ -33,8 +33,8 @@ def detect_cpu_architecture():
     elif architecture.startswith('arm') or architecture == 'aarch64':
         return 'aarch64'
     else:
-        sys.stderr.write(f"Unknown Architecture {architecture} Detected. " \
-                         "Only 'x86_64', 'AMD64' and 'aarch64' supported.\n")
+        sys.stderr.write("Unknown Architecture {} Detected. "
+                         "Only 'x86_64', 'AMD64' and 'aarch64' supported.\n".format(architecture))
         sys.exit(1)
 
 LIBS_PAR_STAT, LIBS_PAR_DYN = [], []
@@ -72,7 +72,7 @@ def detect_cpu_architecture():
     elif ARCH == 'aarch64':
         LIBDIR = 'lib/arm'
     else:
-        sys.stderr.write(f"Unknown CPU architecture '{ARCH}'\n")
+        sys.stderr.write("Unknown CPU architecture '{}'\n".format(ARCH))
 
     SUFF_DYN_LIB = ".so"
     SUFF_STAT_LIB = ".a"