diff --git a/Makefile b/Makefile
index 4368279a2..1aa2224c8 100644
--- a/Makefile
+++ b/Makefile
@@ -1777,12 +1777,12 @@ $(BUILD_PLAT)/romlib/romlib.bin $(BUILD_PLAT)/lib/libwrappers.a $&: $(BUILD_PLAT
 	$(q)${MAKE} PLAT_DIR=${PLAT_DIR} BUILD_PLAT=${BUILD_PLAT} ENABLE_BTI=${ENABLE_BTI} CRYPTO_SUPPORT=${CRYPTO_SUPPORT} ARM_ARCH_MINOR=${ARM_ARCH_MINOR} INCLUDES=$(call escape-shell,$(INCLUDES)) DEFINES=$(call escape-shell,$(DEFINES)) --no-print-directory -C ${ROMLIBPATH} all
 
 memmap: all
-	$(if $(host-poetry),$(q)poetry -q install)
+	$(if $(host-poetry),$(q)poetry -q install --no-root)
 	$(q)$(if $(host-poetry),poetry run )memory -sr ${BUILD_PLAT}
 
 tl: ${BUILD_PLAT}/tl.bin
 ${BUILD_PLAT}/tl.bin: ${HW_CONFIG}
-	$(if $(host-poetry),$(q)poetry -q install)
+	$(if $(host-poetry),$(q)poetry -q install --no-root)
 	$(q)$(if $(host-poetry),poetry run )tlc create --fdt $< -s ${FW_HANDOFF_SIZE} $@
 
 doc:
diff --git a/docs/Makefile b/docs/Makefile
index 68c095812..288cc9701 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2019-2024, Arm Limited. All rights reserved.
+# Copyright (c) 2019-2025, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -24,5 +24,5 @@ help:
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 .DEFAULT: Makefile
-	$(if $(host-poetry),$(q)poetry -q install --with=docs)
+	$(if $(host-poetry),$(q)poetry -q install --no-root --with=docs)
 	$(q)$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 6d59bae63..c8f6b4132 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
+# Copyright (c) 2015-2025, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -502,7 +502,7 @@ ifneq ($(COTDTPATH),)
 		$(q)$($(ARCH)-cpp) $(cot-dt-cpp-flags)
 
         $(BUILD_PLAT)/$(COTDTPATH:.dtsi=.c): $(BUILD_PLAT)/$(COTDTPATH:.dtsi=.dts) | $$(@D)/
-		$(if $(host-poetry),$(q)poetry -q install)
+		$(if $(host-poetry),$(q)poetry -q install --no-root)
 		$(q)$(if $(host-poetry),poetry run )cot-dt2c convert-to-c $< $@
 
         BL2_SOURCES += $(BUILD_PLAT)/$(COTDTPATH:.dtsi=.c)