diff --git a/conda-reqs/esp-tools.yaml b/conda-reqs/esp-tools.yaml
index 4c4bc949..9603f747 100644
--- a/conda-reqs/esp-tools.yaml
+++ b/conda-reqs/esp-tools.yaml
@@ -14,4 +14,4 @@ dependencies:
     # https://docs.conda.io/projects/conda/en/latest/user-guide/concepts/pkg-specs.html#package-match-specifications
     #   documentation on package_spec syntax for constraining versions
 
-    - esp-tools # from ucb-bar channel - https://github.com/ucb-bar/esp-tools-feedstock
+    - esp-tools=1.0.1 # from ucb-bar channel - https://github.com/ucb-bar/esp-tools-feedstock
diff --git a/conda-reqs/riscv-tools.yaml b/conda-reqs/riscv-tools.yaml
index 9edd0d32..ab667b79 100644
--- a/conda-reqs/riscv-tools.yaml
+++ b/conda-reqs/riscv-tools.yaml
@@ -14,4 +14,4 @@ dependencies:
     # https://docs.conda.io/projects/conda/en/latest/user-guide/concepts/pkg-specs.html#package-match-specifications
     #   documentation on package_spec syntax for constraining versions
 
-    - riscv-tools # from ucb-bar channel - https://github.com/ucb-bar/riscv-tools-feedstock
+    - riscv-tools=1.0.1 # from ucb-bar channel - https://github.com/ucb-bar/riscv-tools-feedstock
diff --git a/conda-requirements-riscv-tools.yaml b/conda-requirements-riscv-tools.yaml
index bbc06729..131c3ef5 100644
--- a/conda-requirements-riscv-tools.yaml
+++ b/conda-requirements-riscv-tools.yaml
@@ -26,7 +26,7 @@ dependencies:
     - binutils
 
     - dromajo # from ucb-bar channel - https://github.com/riscv-boom/dromajo
-    - riscv-tools # from ucb-bar channel - https://github.com/ucb-bar/riscv-tools-feedstock
+    - riscv-tools=1.0.1 # from ucb-bar channel - https://github.com/ucb-bar/riscv-tools-feedstock
     - firtool # from ucb-bar channel - https://github.com/ucb-bar/firtool-feedstock
 
     # firemarshal deps