diff --git a/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0-intel-compilers-2022.1.0.eb b/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0-intel-compilers-2022.1.0.eb
index 732b183a34d..e0a1da068c0 100644
--- a/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0-intel-compilers-2022.1.0.eb
+++ b/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0-intel-compilers-2022.1.0.eb
@@ -12,19 +12,23 @@ toolchainopts = {'oneapi': True}
 
 source_urls = ['https://github.com/flame/blis/archive/']
 sources = ['%(version)s.tar.gz']
-checksums = ['1135f664be7355427b91025075562805cdc6cc730d3173f83533b2c5dcc2f308']
+patches = [
+    '%(name)s-%(version)s_blastest-enable-complex-return-intel.patch',
+    '%(name)s-%(version)s_ifx-complex-return-intel.patch',
+]
+checksums = [
+    '1135f664be7355427b91025075562805cdc6cc730d3173f83533b2c5dcc2f308',  # 0.9.0.tar.gz
+    # BLIS-0.9.0_blastest-enable-complex-return-intel.patch
+    '0f1966b340d1f24cf02070f00f72f232b4cbfcd242ee9ce8c5f09f7220397cb4',
+    '097a2647b5c66386155cf6a33a2a617b876bd0f9096a2912359eb0897a29d2d5',  # BLIS-0.9.0_ifx-complex-return-intel.patch
+]
 
 builddependencies = [
     ('Python', '3.10.4', '-bare'),
     ('Perl', '5.34.1'),
 ]
 
-configopts = '--enable-cblas --enable-threading=openmp --enable-shared --complex-return=intel CC="$CC" auto'
-
-# Intel expects classic f2c-style calling convention.
-pretestopts = 'for cu in c u; do for cz in c z; do '
-pretestopts += 'sed -i "s/\([^ ]*complex\) ${cz}dot${cu}_(/void ${cz}dot${cu}_(\\1 \*, /g;'
-pretestopts += 's/\([qz]__1\) = ${cz}dot${cu}_(/${cz}dot${cu}_(\&\\1, /g" blastest/src/${cz}blat1.c; done; done && '
+configopts = '--enable-cblas --enable-threading=openmp --enable-shared CC="$CC" auto'
 
 runtest = 'check'
 
diff --git a/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0_blastest-enable-complex-return-intel.patch b/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0_blastest-enable-complex-return-intel.patch
new file mode 100644
index 00000000000..488a5e3f17e
--- /dev/null
+++ b/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0_blastest-enable-complex-return-intel.patch
@@ -0,0 +1,169 @@
+From 9b1beec60be31c6ea20b85806d61551497b699e4 Mon Sep 17 00:00:00 2001
+From: bartoldeman <bartoldeman@users.noreply.github.com>
+Date: Mon, 11 Jul 2022 20:15:12 -0400
+Subject: [PATCH] Use BLIS_ENABLE_COMPLEX_RETURN_INTEL in blastest files (#636)
+
+Details:
+- Fixed a crash that occurs when either cblat1 or zblat1 are linked
+  with a build of BLIS that was compiled with '--complex-return=intel'.
+  This fix involved inserting preprocessor macro guards based on
+  BLIS_ENABLE_COMPLEX_RETURN_INTEL into blastest/src/cblat1.c and
+  blastest/src/zblat1.c to correctly handle situations where BLIS is
+  compiled with Intel/f2c-style calling conventions for complex numbers.
+- Updated blastest/src/fortran/run-f2c.sh so that future executions
+  will insert the aforementioned cpp macro conditional where
+  appropriate.
+---
+ blastest/src/cblat1.c           | 32 ++++++++++++++++++++++++++++----
+ blastest/src/fortran/run-f2c.sh | 20 +++++++++++---------
+ blastest/src/zblat1.c           | 32 ++++++++++++++++++++++++++++----
+ 3 files changed, 67 insertions(+), 17 deletions(-)
+
+diff --git a/blastest/src/cblat1.c b/blastest/src/cblat1.c
+index daccb2f6c..606511662 100644
+--- a/blastest/src/cblat1.c
++++ b/blastest/src/cblat1.c
+@@ -475,11 +475,23 @@ static real c_b52 = 0.f;
+     integer mx, my;
+     complex cdot[1];
+     integer lenx, leny;
+-    extern /* Complex */ complex cdotc_(integer *, complex *, integer 
++    extern /* Complex */
++#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL
++ void cdotc_(complex *,
++#else
++complex cdotc_(
++#endif
++ integer *, complex *, integer 
+ 	    *, complex *, integer *);
+     extern /* Subroutine */ int ccopy_(integer *, complex *, integer *, 
+ 	    complex *, integer *);
+-    extern /* Complex */ complex cdotu_(integer *, complex *, integer 
++    extern /* Complex */
++#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL
++ void cdotu_(complex *,
++#else
++complex cdotu_(
++#endif
++ integer *, complex *, integer 
+ 	    *, complex *, integer *);
+     extern /* Subroutine */ int cswap_(integer *, complex *, integer *, 
+ 	    complex *, integer *), ctest_(integer *, complex *, complex *, 
+@@ -526,14 +538,26 @@ static real c_b52 = 0.f;
+ 	    }
+ 	    if (combla_1.icase == 1) {
+ /*              .. CDOTC .. */
+-		q__1 = cdotc_(&combla_1.n, cx, &combla_1.incx, cy, &
++
++#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL
++		cdotc_(&q__1,
++#else
++		q__1 = cdotc_(
++#endif
++		 &combla_1.n, cx, &combla_1.incx, cy, &
+ 			combla_1.incy);
+ 		cdot[0].r = q__1.r, cdot[0].i = q__1.i;
+ 		ctest_(&c__1, cdot, &ct6[kn + (ki << 2) - 5], &csize1[kn - 1],
+ 			 sfac);
+ 	    } else if (combla_1.icase == 2) {
+ /*              .. CDOTU .. */
+-		q__1 = cdotu_(&combla_1.n, cx, &combla_1.incx, cy, &
++
++#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL
++		cdotu_(&q__1,
++#else
++		q__1 = cdotu_(
++#endif
++		 &combla_1.n, cx, &combla_1.incx, cy, &
+ 			combla_1.incy);
+ 		cdot[0].r = q__1.r, cdot[0].i = q__1.i;
+ 		ctest_(&c__1, cdot, &ct7[kn + (ki << 2) - 5], &csize1[kn - 1],
+diff --git a/blastest/src/fortran/run-f2c.sh b/blastest/src/fortran/run-f2c.sh
+index fdad4fd34..f0df2f5b8 100755
+--- a/blastest/src/fortran/run-f2c.sh
++++ b/blastest/src/fortran/run-f2c.sh
+@@ -50,13 +50,15 @@ recursive-sed.sh -c "s/-4.f };/-4.f }};/g" -p "s*1.c"
+ 
+ # Convert from brain-dead f2c complex calling conventions to normal
+ # return-based conventions.
+-recursive-sed.sh -c "s/void cdotc_(complex \*, /complex cdotc_(/g" -p "c*1.c"
+-recursive-sed.sh -c "s/void cdotu_(complex \*, /complex cdotu_(/g" -p "c*1.c"
+-recursive-sed.sh -c "s/cdotc_(&q__1, /q__1 = cdotc_(/g" -p "c*1.c"
+-recursive-sed.sh -c "s/cdotu_(&q__1, /q__1 = cdotu_(/g" -p "c*1.c"
+-
+-recursive-sed.sh -c "s/void zdotc_(doublecomplex \*, /doublecomplex zdotc_(/g" -p "z*1.c"
+-recursive-sed.sh -c "s/void zdotu_(doublecomplex \*, /doublecomplex zdotu_(/g" -p "z*1.c"
+-recursive-sed.sh -c "s/zdotc_(\&z__1, /z__1 = zdotc_(/g" -p "z*1.c"
+-recursive-sed.sh -c "s/zdotu_(\&z__1, /z__1 = zdotu_(/g" -p "z*1.c"
++subst1='\n#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL\n&\n#else\n'
++subst2='\n#endif\n'
++recursive-sed.sh -c "s/ void cdotc_(complex \*,/${subst1}complex cdotc_(${subst2}/g" -p "c*1.c"
++recursive-sed.sh -c "s/ void cdotu_(complex \*,/${subst1}complex cdotu_(${subst2}/g" -p "c*1.c"
++recursive-sed.sh -c "s/\(.*\)cdotc_(&q__1,/${subst1}\1q__1 = cdotc_(${subst2}\1/g" -p "c*1.c"
++recursive-sed.sh -c "s/\(.*\)cdotu_(&q__1,/${subst1}\1q__1 = cdotu_(${subst2}\1/g" -p "c*1.c"
++
++recursive-sed.sh -c "s/ void zdotc_(doublecomplex \*,/${subst1}doublecomplex zdotc_(${subst2}/g" -p "z*1.c"
++recursive-sed.sh -c "s/ void zdotu_(doublecomplex \*,/${subst1}doublecomplex zdotu_(${subst2}/g" -p "z*1.c"
++recursive-sed.sh -c "s/\(.*\)zdotc_(\&z__1,/${subst1}\1z__1 = zdotc_(${subst2}\1/g" -p "z*1.c"
++recursive-sed.sh -c "s/\(.*\)zdotu_(\&z__1,/${subst1}\1z__1 = zdotu_(${subst2}\1/g" -p "z*1.c"
+ 
+diff --git a/blastest/src/zblat1.c b/blastest/src/zblat1.c
+index c34a57262..b620910be 100644
+--- a/blastest/src/zblat1.c
++++ b/blastest/src/zblat1.c
+@@ -459,12 +459,24 @@ static doublereal c_b52 = 0.;
+     integer lenx, leny;
+     extern /* Subroutine */ int ctest_(integer *, doublecomplex *, 
+ 	    doublecomplex *, doublecomplex *, doublereal *);
+-    extern /* Double Complex */ doublecomplex zdotc_(integer *, 
++    extern /* Double Complex */
++#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL
++ void zdotc_(doublecomplex *,
++#else
++doublecomplex zdotc_(
++#endif
++ integer *, 
+ 	    doublecomplex *, integer *, doublecomplex *, integer *);
+     integer ksize;
+     extern /* Subroutine */ int zcopy_(integer *, doublecomplex *, integer *, 
+ 	    doublecomplex *, integer *);
+-    extern /* Double Complex */ doublecomplex zdotu_(integer *, 
++    extern /* Double Complex */
++#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL
++ void zdotu_(doublecomplex *,
++#else
++doublecomplex zdotu_(
++#endif
++ integer *, 
+ 	    doublecomplex *, integer *, doublecomplex *, integer *);
+     extern /* Subroutine */ int zswap_(integer *, doublecomplex *, integer *, 
+ 	    doublecomplex *, integer *), zaxpy_(integer *, doublecomplex *, 
+@@ -508,14 +520,26 @@ static doublereal c_b52 = 0.;
+ 	    }
+ 	    if (combla_1.icase == 1) {
+ /*              .. ZDOTC .. */
+-		z__1 = zdotc_(&combla_1.n, cx, &combla_1.incx, cy, &
++
++#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL
++		zdotc_(&z__1,
++#else
++		z__1 = zdotc_(
++#endif
++		 &combla_1.n, cx, &combla_1.incx, cy, &
+ 			combla_1.incy);
+ 		cdot[0].r = z__1.r, cdot[0].i = z__1.i;
+ 		ctest_(&c__1, cdot, &ct6[kn + (ki << 2) - 5], &csize1[kn - 1],
+ 			 sfac);
+ 	    } else if (combla_1.icase == 2) {
+ /*              .. ZDOTU .. */
+-		z__1 = zdotu_(&combla_1.n, cx, &combla_1.incx, cy, &
++
++#ifdef BLIS_ENABLE_COMPLEX_RETURN_INTEL
++		zdotu_(&z__1,
++#else
++		z__1 = zdotu_(
++#endif
++		 &combla_1.n, cx, &combla_1.incx, cy, &
+ 			combla_1.incy);
+ 		cdot[0].r = z__1.r, cdot[0].i = z__1.i;
+ 		ctest_(&c__1, cdot, &ct7[kn + (ki << 2) - 5], &csize1[kn - 1],
diff --git a/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0_ifx-complex-return-intel.patch b/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0_ifx-complex-return-intel.patch
new file mode 100644
index 00000000000..334b576ee35
--- /dev/null
+++ b/easybuild/easyconfigs/b/BLIS/BLIS-0.9.0_ifx-complex-return-intel.patch
@@ -0,0 +1,38 @@
+From 98d467891b74021ace7f248cb0856bec734e39b6 Mon Sep 17 00:00:00 2001
+From: bartoldeman <bartoldeman@users.noreply.github.com>
+Date: Mon, 11 Jul 2022 19:40:53 -0400
+Subject: [PATCH] Change complex_return='intel' for ifx. (#637)
+
+Details:
+- When checking the version string of the Fortran compiler for the
+  purposes of determining a default return convention for complex
+  domain values, grep for "IFORT" instead of "ifort" since that string
+  is common to both the 'ifx' and 'ifort' binaries provided by Intel:
+
+    $ ifx --version
+    ifx (IFORT) 2022.1.0 20220316
+    Copyright (C) 1985-2022 Intel Corporation. All rights reserved.
+
+    $ ifort --version
+    ifort (IFORT) 2021.6.0 20220226
+    Copyright (C) 1985-2022 Intel Corporation. All rights reserved.
+---
+ configure | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/configure b/configure
+index 5ff877317..a6018edab 100755
+--- a/configure
++++ b/configure
+@@ -3688,9 +3688,9 @@ main()
+ 			# Query the compiler "vendor" (ie: the compiler's simple name).
+ 			# The last part ({ read first rest ; echo $first ; }) is a workaround
+ 			# to OS X's egrep only returning the first match.
+-			fc_vendor=$(echo "${vendor_string}" | egrep -o 'ifort|GNU' | { read first rest ; echo $first ; })
++			fc_vendor=$(echo "${vendor_string}" | egrep -o 'IFORT|GNU' | { read first rest ; echo $first ; })
+ 
+-			if [ "x${fc_vendor}" = "xifort" ]; then
++			if [ "x${fc_vendor}" = "xIFORT" ]; then
+ 				complex_return='intel'
+ 			elif [ "x${fc_vendor}" = "xGNU" ]; then
+ 				complex_return='gnu'